PHOTOS: Preparing for the big night

Actress Eva Longoria is interviewed on the floor of the Democratic National Convention. (Charles Dharapak/AP Photo)

Musican Dave Grohl (C) of the Foo Fighters performs for a soundcheck during the final day of the DNC. (Alex Wong/Getty Images)

Vice President Joe Biden smiles during a soundcheck. (Jae C. Hong/AP Photo)

Singer James Tayler performs with his band during a soundcheck. (Lynne Sladky/AP Photo)

Sheriff Michael Johnson of Clayton County, Georgia directs traffic near the Time Warner Cable Arena. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. (Stan HONDASTAN/GettyImages)

Renee Watson of San Antonio, TX wears a cowboy hat decorated with campaign buttons during the final day of the DNC. (Tom Pennington/Getty Images)