Thousands expected for event celebrating 150th anniversary of Gettysburg Address

President Abraham Lincoln, Gettysburg Address

Thousands of people are heading to central Pennsylvania to commemorate the Gettysburg Address, a speech that for 150 years has been a source of national identity.

The keynote speakers for the anniversary of the speech today in Gettysburg are Interior Secretary Sally Jewell and James McPherson, a leading Civil War scholar. Pennsylvania Gov. Tom Corbett will also deliver remarks.

The main event is the reading of President Abraham Lincoln's speech, first delivered in Gettysburg months after the pivotal Civil War battle that left tens of thousands of men wounded, dead or missing.

The event is marked annually at Soldiers' National Cemetery. Last year's commemoration drew some 9,000 people.