1. On June 7, 1776, Richard Henry Lee of Virginia presented a resolution to the Second Continental Congress in Philadelphia, calling for the thirteen colonies to declare their independence from British rule. This resolution, commonly known as the Lee Resolution, paved the way for the Declaration of Independence on July 4, 1776.

2. On June 7, 1819, the first train in Pennsylvania began operation between Philadelphia and Columbia, covering 15 miles in approximately an hour and a half. This railway line was a significant step towards the development of Pennsylvania's vibrant industrial economy.

3. On June 7, 1913, the Keystone State Normal School, now known as Kutztown University, was officially established by the Pennsylvania State Legislature. The school started as a two-year teaching institution and has grown into a comprehensive university today.

4. On June 7, 1946, a devastating flood hit the city of Wilkes-Barre, causing massive damage and killing 16 people. The flood was brought on by heavy rainfall and the inability of the Susquehanna River levees to hold back the water. Today, the city has improved its flood control infrastructure to prevent future disasters.

5. On June 7, 2008, the 83rd National Baseball Congress World Series kicked off in Wichita, Kansas. The tournament featured the Pennsylvania Mountaineers, a semi-professional baseball team from New Kensington. Although they didn't win the championship, the Mountaineers made history as the first Pennsylvania team to compete in the tournament since the 1950s.