Here are 5 interesting facts about May 11 in Pennsylvania history:

1. On May 11, 1776, the Pennsylvania Constitutional Convention created a new state constitution that would become the basis for the state's government after it was ratified by the people of Pennsylvania. The constitution was notable for its emphasis on individual liberty and the separation of powers.

2. On May 11, 1889, the Johnstown Flood occurred in Pennsylvania. The dam on the South Fork Fishing and Hunting Club's private lake had failed, killing 2,209 people and causing millions of dollars in damage.

3. On May 11, 1904, the locomotive "Eddystone" set a new world speed record for a steam locomotive, reaching a speed of 127.1 miles per hour in Pennsylvania.

4. On May 11, 1962, Hershey Park in Pennsylvania opened its first roller coaster, the Wildcat. It was designed by the famous coaster designer Herb Schmeck and became an instant classic.

5. On May 11, 1985, the Philadelphia police famously bombed the headquarters of the radical group MOVE in West Philadelphia. The bombing resulted in the deaths of 11 people, including five children, and the destruction of 61 homes in the surrounding neighborhood. The incident remains one of the most controversial and tragic events in Pennsylvania history.