William Zachariah Biddle (born 1849)

In 1849, in the year that William Zachariah Biddle was born, on January 23rd, British-born Elizabeth Blackwell became a doctor in the U.S. She earned a medical degree at the Geneva Medical College in New York. Blackwell was the first female doctor with a degree in the U.S.

In 1883, on February 28th, in Boston MA, the first vaudeville theater was opened by Benjamin Franklin Keith.

In 1958, on January 31st, Explorer I, the United States' answer to Sputnik I (and 2,) was launched. America had entered the Space Race. The first spacecraft to detect the Van Allen radiation belt, it remained in orbit until 1970.

In 1975, on September 5th, Lynette "Squeaky" Fromme tried to assassinate President Ford in Sacramento, California. She failed when her gun wouldn't fire. President Ford escaped a second assassination attempt 17 days later on September 22 when Sarah Jane Moore tried to shoot him in San Francisco. A bystander saw her raise her arm, grabbed it, and the shot went wild.

In 1995, on May 19th, the deadliest terrorist attack on American soil - before 9/11 - took place in Oklahoma City. A truck bomb went off outside the Alfred P. Murrah Federal Building in downtown - killing 68 people, injuring more than 680 others, and destroying one-third of the building. The most disturbing images were of children - a daycare center was hit by the bomb. The deadliest incident of domestic terrorism ever, Timothy McVeigh, Terry Nichols, and Michael Fortier were convicted of the bombing.