History
9/11 Terrorist Attack Explained
Learn what happened during the September 11 attacks, who carried them out, why they occurred, and how 9/11 changed the United States.
Holiday
Labor Day Explained
Learn why Labor Day is celebrated, how the labor movement shaped the holiday, and why Americans observe it on the first Monday of September.
The Constitution of the United States of America
The 27th Amendment Explained
Learn how the 27th Amendment limits changes to congressional pay by requiring an election to occur before the changes take effect.
The Constitution of the United States of America
The 26th Amendment Explained
Learn how the 26th Amendment lowered the voting age to 18 and protects the right of young Americans to vote.
The Constitution of the United States of America
The 25th Amendment Explained
Learn how the 25th Amendment handles presidential succession, disability, and the transfer of presidential powers.
The Constitution of the United States of America
The 24th Amendment Explained
Learn how the 24th Amendment banned poll taxes in federal elections, removing a financial barrier to voting.
The Constitution of the United States of America
The 23rd Amendment Explained
Learn how the 23rd Amendment gives Washington, D.C. electoral votes in presidential elections and allows its residents to vote for President.
The Constitution of the United States of America
The 22nd Amendment Explained
Learn how the 22nd Amendment limits a President to two elected terms and sets rules for presidents who serve part of another term.
The Constitution of the United States of America
The 21st Amendment Explained
Learn how the 21st Amendment repealed Prohibition, ending the nationwide ban on alcohol established by the Eighteenth Amendment.
The Constitution of the United States of America
The 20th Amendment Explained
Learn how the 20th Amendment sets the terms for when the President, Vice President, and Congress begin their terms and handles transitions.
The Constitution of the United States of America
The 19th Amendment Explained
Learn how the 19th Amendment protected women's right to vote and prohibited denying the vote based on sex.
The Constitution of the United States of America
The 18th Amendment Explained
Learn how the 18th Amendment established Prohibition, restricted the production and sale of alcohol, and was later repealed.