F93VC_160530_150
Existing comment: At the White House, staff prepare for the annual Congressional Picnic, a Texas-style barbecue for Congress and their families that afternoon.

Almost 4,500 planes are in flight over the United States.

8:16am:
Classes begin at Shanksville Stonycreek School for approximately 490 children in Kindergarten through Grade 12.

8:20am:
American Airlines Flight 77 leaves Washington DC for Los Angeles with 64 people aboard.

8:42am:
Flight 93 takes off with 44 people aboard after a delay of about 25 minutes due to heavy air traffic at Newark.
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