By 1980, every U.S. state had vaccine-related laws concerning children before they entered school, with some states allowing county public health boards to decide which vaccines were required.

More than 99% of species listed under the U.S. Endangered Species Act have avoided extinction due to the law's protections.

AARO's historical review found no evidence that the U.S. government possessed extraterrestrial technology.

The FBI may treat the existence of classified records concerning foreign intelligence, counterintelligence, or international terrorism as exempt from FOIA disclosure requirements.

In 1971, Mike Gravel conducted a one-man filibuster against the Vietnam-era draft and read 4,100 pages of the 7,000-page Pentagon Papers into the Congressional Record.

By 1998–1999, all but four U.S. states required vaccines for students entering kindergarten through 12th grade, while 30 states required vaccines for students entering college for the first time.

In the 1980s, the U.S. Congress passed a law shutting down American support to the Contras in Nicaragua.

Executive Order 14176, signed by President Donald Trump on January 23, 2025, covers records concerning the assassinations of John F. Kennedy, Robert F. Kennedy, and Martin Luther King Jr.

Espionage can be illegal and punishable by law in some circumstances.

Under the Anti-Deficiency Act (31 U.S.C. § 1341), recovery-plan language cannot commit a federal agency to obligate or pay funds in any fiscal year beyond the appropriations made by Congress.

AARO found no empirical evidence supporting claims that the U.S. government or private companies had been reverse-engineering extraterrestrial technology.

In a 2015 case upholding the constitutionality of Arizona's independent redistricting commission, a Supreme Court majority consisting of the four liberal justices and Justice Anthony Kennedy rejected the independent state legislature theory.

The Supreme Court was asked to review a Texas law requiring the Ten Commandments to be displayed in public schools.

By law, all activities conducted under the Foreign Intelligence Surveillance Act must be consistent with the Fourth Amendment to the U.S. Constitution.

Regulations required nondisclosure of security-related information obtained under the Aviation and Transportation Security Act or 49 U.S.C. chapter 449 if the Under Secretary determined disclosure would constitute an unwarranted invasion of personal privacy, reveal a trade secret or confidential commercial/financial information, or be detrimental to transportation security.

Under FOIA, an intelligence-community agency or component may not release records under the ordinary request provision to a foreign government entity other than a U.S. state, territory, commonwealth, or district, or to a representative of such foreign government entity.

The Supreme Court's online collection includes joint appendices beginning in January 1979, with some selected joint-appendix coverage dating back to 1936.

The United States dropped more bombs on Laos than on any other country in history.

The Under Secretary of Transportation for Security could issue an emergency regulation or security directive without notice, public comment, or prior approval from the Secretary of Transportation, and such a measure could remain effective for no more than 90 days unless ratified by the Transportation Security Oversight Board or rescinded.

Abo Elementary School in Artesia, New Mexico was the first public school in the United States constructed entirely underground.

The Foreign Intelligence Surveillance Act of 1978 authorizes the collection of electronic communications within the United States by compelling assistance from U.S. service providers.

On August 24, 1814, British forces burned the U.S. Capitol during the War of 1812, destroying the Library of Congress's original collection of 3,000 volumes.

The U.S. Copyright Office has been housed in the Library of Congress since 1870, when copyright applicants began being required to submit two copies of their works.

The July 2025 National Archives release included FBI records from the investigation code-named 'MURKIN' into the MLK assassination.

Sen. Cory Booker's more-than-25-hour Senate speech surpassed the previous record set by Sen. Strom Thurmond of South Carolina during a 1957 filibuster against the advance of the Civil Rights Act.

Under 5 U.S.C. § 552(a)(3)(E), Intelligence Community agencies are prohibited from disclosing records in response to FOIA requests made by any foreign government or international governmental organization, whether directly or through a representative.

To rebuild its collection, Congress purchased former president Thomas Jefferson's personal library of 6,487 books for $23,950 on January 30, 1815.

A Transportation Security Administration employee or other federal employee designated as a law enforcement officer could carry a firearm, make a warrantless arrest for a felony based on probable cause, and seek and execute federal arrest or evidence-seizure warrants.

Access to the Supreme Court Library is limited under Supreme Court Rule 2.1 to appropriate Court personnel, members of the Court's Bar, Members of Congress and their legal staffs, and attorneys for the United States and federal departments and agencies.

The United States conducted its first successful nuclear test in 1945.