The 2001 Authorization for Use of Military Force has been used by four administrations to justify military operations in 22 countries

A formal declaration of war automatically triggers hundreds of statutes granting the president sweeping domestic authority

Beyond authorizing military force abroad, a formal declaration activates a wide range of domestic powers, including authority over enemy property, trade restrictions, and emergency economic authority. It also waives the 60-day time limits under the War Powers Resolution.

How NATO responded to 9/11

The collective defense clause of the NATO constitution has only been invoked one time: after the 9/11 terrorist attacks against the United States. This video explores the immediate actions NATO took to respond to the attacks to support the United States. These firsthand clips from 2001 give a sense of the magnitude of the moment and the difficult decisions facing NATO leaders at the time.

Congress has unsuccessfully voted on war powers resolutions over Trump's military operations in Venezuela and Iran

After Trump ordered unilateral military operations in both Venezuela and Iran without congressional authorization, lawmakers from both parties introduced war powers resolutions to block further action. Each effort failed, with Republican majorities largely supporting the president.

The 1967 war was the first use of oil as a geopolitical weapon

Following the June 1967 Arab–Israeli war, Saudi Arabia, Kuwait, Iraq, Libya, and Algeria embargoed oil shipments to the US, UK, and West Germany. While the move did not have a large impact, it reshaped global oil flows, and foreshadowed OAPEC's later actions.

The Iraq War, in photos

2023 marked the 20th anniversary of the start of the Iraq War. The U.S. carried out its first airstrikes in Iraq on March 20, 2003 – during a phase of ‘shock and awe’. Fires burning in and around Baghdad; U.S. soldiers on patrol; Iraqi...

The attacks prompted a quick jump in American public support for war

In a Gallup poll taken days after the attack, an extraordinary 97% of Americans approved Congress declaring war on Japan—reflecting overwhelming national unity in the wake of the strike.

Anti-money laundering laws forcing banks to report data have become important foreign policy tools

Since the Bank Secrecy Act of 1970, which required banks to report transactions exceeding $10K and keep records on customers, anti-money laundering laws have become an important proxy for American foreign policy initiatives. Increased regulation via financial institutions helps curb drug and human trafficking, as well as destabilize the financial infrastructure for terrorist organizations.

The ACLU was founded in 1920 in direct response to the suppression of speech during World War I

The mass arrest and prosecution of anti-war activists, socialists, and immigrants under the Espionage and Sedition Acts prompted a group of civil libertarians to form the American Civil Liberties Union to defend constitutional rights.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

The second attack used to justify full-scale US involvement in Vietnam never happened as reported

In August 1964, Washington claimed that North Vietnam launched two attacks on US destroyers in the Gulf of Tonkin. The second, used to justify escalating the US war effort, was later revealed to most likely have been a radar mistake.

Hawaii lived under martial law for nearly three years after Pearl Harbor

After the attack, Hawaii was placed under sweeping military rule—curfews, censorship, warrantless arrests, ID papers, and mass detentions transformed everyday life. More than 2,000 people were arrested within 48 hours of the attack, and the islands remained under martial law for nearly three years.

Military bases were once targets for payday loans and other predatory lending

The Military Lending Act of 2006—a federal law—capped the interest a lender can charge an active-duty soldier at 36% after the Department of Defense criticized payday lenders for targeting young soldiers with high-interest, short-term loans. However, many towns near military bases still have predatory businesses that critics say take advantage of army families living paycheck to paycheck. (Some readers may experience a paywall.)

At 3 pm on Memorial Day, Americans are asked to pause for one minute of silence

President Bill Clinton first called for the National Moment of Remembrance in 1999, and Congress made it law in 2000. The time was chosen because most Americans are in the middle of holiday activities.

The International Religious Freedom Act of 1998 made religious liberty a formal US foreign policy priority

Congress enacted the International Religious Freedom Act to make promoting religious freedom abroad a stated goal of US foreign policy. The law established an ambassador-at-large for international religious freedom and mandated that the State Department report annually on the status of religious freedom.

George W. Bush delivered the first State of the Union livestreamed online

In 2002, George W. Bush became the first president to livestream the State of the Union, using the address to label Iraq, Iran, and North Korea an "axis of evil," shaping US strategy during the War on Terror.

A brief history of drones

While accounts of military strategists using uncrewed hot air balloons for attacks and surveillance exist from the 19th century, the first use of drones as a modern concept began in World War I with a radio-controlled propeller craft. This online...

US troops committed widespread atrocities during the Mexican-American War

American volunteer regiments frequently looted towns, raped civilians, and executed prisoners—especially in occupied northern Mexico. Historians have documented how racial hatred and impunity fueled war crimes that were rarely punished by military leadership.

Go inside Air Force One

Air Force One is the official aircraft used to transport the US president, serving as both a mobile office and command center. Over the decades, its technology, security, and symbolism have evolved—from Roosevelt's early prop planes to today's highly advanced Boeing jets.

In 2024, the US committed about $82.3B to foreign aid.

That year, 67.2% of foreign aid was for economic purposes, and the remaining 32.8% was for military purposes. Israel received more US foreign aid than any other country in 2024.

A primer on USAID under the Trump Administration

The Congressional Research Service is a nonpartisan group dedicated solely to responding to questions and providing deeply researched explanations to members of Congress and their staff. The overview lays out the establishment of the US Agency for International Development in 1961, legal restrictions on its elimination, and options to restructure or fold USAID into other departments.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

McCulloch v. Maryland upheld implied powers and blocked states from taxing the federal government

In 1819, McCulloch v. Maryland confirmed that Congress may use implied powers under the necessary and proper clause and ruled that states cannot tax federal institutions, reaffirming the supremacy of the federal government within its constitutionally delegated powers.

The US handed control of the canal back to Panama in 1999

This was the result of two treaties signed during President Jimmy Carter's presidency, one shifting control to Panama and the other declaring the canal zone neutral. In recent years, US officials have suggested the US may retake control. Experts agree that the only viable way would be through military force.

The US Constitution has been amended 27 different times since its ratification

Dive deeper into each amendment to the Constitution with resources provided by the National Constitution Center. This website features podcasts, videos, and other web resources for each of the amendments, examining their creation and their impact on today’s political and social landscape.

The UN’s 1990s peacekeeping mission in Rwanda failed to prevent a genocide

During a 100-day period in 1994, nearly 1 million Tutsi and moderate Hutu civilians were murdered, a tragedy that exemplified the limitations of the UN’s ability to protect populations from mass killing.

A majority in surveyed countries approve of the UN

A 2024 Pew Research Center survey found that a median of 58% across 35 countries viewed the UN favorably, while 31% held unfavorable views. Notably, younger adults tended to view the UN more positively than older generations. The report offers a detailed, country-by-country analysis of global perceptions of the UN.

A fake vaccine campaign was used to locate Osama bin Laden, fueling vaccine distrust

As part of the intelligence operation to find bin Laden in Pakistan, the US Central Intelligence Agency recruited a Pakistani doctor who ran a fake hepatitis B vaccine campaign and obtained DNA samples from bin Laden. News of this fake campaign fueled further distrust of healthcare workers, attacks on them, and stymied efforts to vaccinate against polio in the region.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

Experimental hantavirus vaccines and therapies, still under development, have long been funded by the US military.

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

US intelligence allegedly pursued more than 600 schemes to assassinate Cuban revolutionary Fidel Castro.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

See this overview of the firework rules across all 50 states, ranging from a complete ban on non-professional fireworks in Massachusetts to states with more lax rules like Indiana.

View the ten deadliest tornadoes in US history.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.