During World War II, Oskar Schindler saved over 1,200 Jews by employing them in his factories, preventing their deportation to concentration camps.
Irena Sendler smuggled around 2,500 Jewish children out of the Warsaw Ghetto during the Holocaust, saving them from certain death.
In 1981, Ronald Reagan was shot by John Hinckley Jr., but survived due to the quick actions of his Secret Service agents.
Clara Barton, known as the 'Angel of the Battlefield,' provided aid to wounded soldiers during the Civil War and later founded the American Red Cross.
In 2001, passengers aboard United Flight 93 fought back against hijackers, preventing the plane from reaching its intended target on 9/11.
Hugh Thompson Jr. intervened to stop the My Lai Massacre during the Vietnam War, saving numerous Vietnamese civilians from being killed by US soldiers.