CHESAPEAKE, VA - AUGUST 21: Presumptive Democratic presidential nominee U.S. Sen. Barack Obama (D-IL) shakes hands with supporters after speaking during a town hall event at Oscar Smith High School August 21, 2008 in Chesapeake, Virginia. Reports indicate that Obama has chosen and will soon announce his Vice Presidential candidate.
ASTOR, FL - AUGUST 21: Edwin Romph walks to a friend's flooded home from Tropical Storm Fay August 21, 2008 in Astor, Florida. Fay is expected to produce rainfall accumulations over the next few days of 5 to 10 inches across the northern portion of Florida with isolated amounts of up to 15 inches according to the National Hurricane Center.
CENTENNIAL, CO - AUGUST 21: Members of a hazardous materials team wear protective suits as they head into Republican presidential candidate John McCain's campaign office August 21, 2008 in Centennial, Colorado. A threatening letter containing white powder was received at the suburban Denver office, prompting several workers to go to a hospital on their own, though no injuries were reported.
CENTENNIAL, CO - AUGUST 21: Members of a hazardous materials team put on protective suits as they prepare to head into Republican presidential candidate John McCain's campaign office August 21, 2008 in Centennial, Colorado. A threatening letter containing white powder was received at the suburban Denver office, prompting several workers to go to a hospital on their own, though no injuries were reported.