saul loeb/AFP/Getty Images

Mitt Romney, left, and Paul Ryan waved to supporters Saturday at a campaign rally in Manassas, Va.

joe mahoney/associated press

Mitt Romney, left, and Paul Ryan addressed a rally Saturday in Ashland, Va.

Justin Sullivan/Getty Images

Paul Ryan spoke after being introduced by Mitt Romney in Norfolk, Va.

Shannon Stapleton/REUTERS

Romney (right) and Ryan walked with Ryan's daughter, Liza, to the Romney campaign bus.

SAUL LOEB/AFP/GettyImages

Ryan greeted supporters.

Justin Sullivan/Getty Images

Romney greeted members of the Ryan family at the close of Saturday's campaign event.

Jason Reed/REUTERS

Romney introduced Ryan as his running mate during the campaign event in Norfolk, Va., on Saturday.

Jason Reed/REUTERS

Romney's campaign had previously announced the pick via a phone app.

SAUL LOEB/AFP/GettyImages

The event was held on the USS Wisconsin, a retired battleship.

Shannon Stapleton/REUTERS

A supporter held her hand over her heart for the national anthem.

Shannon Stapleton/REUTERS

Supporters waited for the event to begin.