July 7th, 2005:(AP Archive Video / AP Photos)(NAT of Ambulances with SOT of Eyewitness) In London, suicide terrorist bombings strike three Underground stations --- and a double-decker bus. The blasts kill 52 victims and four bombers --- in the worst attack on the British capital since World War Two. 1865:(AP Photos)In Washington, four people are hanged for conspiring with John Wilkes Booth to assassinate President Abraham Lincoln. 1987:(AP Archive Video)(SOT of North)Also in Washington, Lieutenant Colonel Oliver North begins his public testimony at congressional hearings on the Iran-Contra affair. The former Reagan White House aide at the heart of the arms-for-hostages scandal says he "never carried out a single act" without authorization. 1981:(AP Archive Video / AP Photos)President Ronald Reagan nominates Sandra Day O'Connor, an Arizona judge, to be the first female justice on the U.S. Supreme Court. 1907:(AP Photos)Robert Heinlein --- the science fiction writer whose works include "Stranger in a Strange Land" --- is born in Butler, Missouri. And, 1940:(AP Photos)(NAT of 'With A Little Help From My Friends')Musician Ringo Starr --- the drummer in the rock band The Beatles --- is born Richard Starkey in Liverpool, England.