The Old Guard prepares cannons for July Fourth

The Old Guard prepares cannons for the boom during Tchaikovsky's "1812 Overture" at the conclusion of the "A Capitol Fourth 2011" concert.

This cannon will be fired by members of the Old Guard Presidential Salute Battery on the Fourth of July during celebrations at the U.S. Capitol and on the National Mall. (Drew Angerer/The Washington Times)

This cannon will be fired by members of the Old Guard Presidential Salute Battery on the Fourth of July during celebrations at the U.S. Capitol and on the National Mall. (Drew Angerer/The Washington Times)

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