(Gettysburg) -- Authorities are urging people to trust their instincts and report any suspicious activity during celebrations commemorating the 150th anniversary of the Battle of Gettysburg.
The National Park Service and others are finalizing preparations for the commemoration of the pivotal battle of the Civil War.
Tens of thousands of visitors are expected for 10 days of events, beginning June 29.
Pennsylvania State Police and other authorities held a training session for local businesses Wednesday, urging people to report anything out of the ordinary.
Sgt. William McAreavy says it's better for people to report it and have it turn out to be nothing, than not to report it.
Federal and local authorities say they'll have both a visible and invisible police presence in the crowds.
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