FAIRFAX, VA - JULY 10:  Presumptive Democratic presidential candidate Sen. Barack Obama (D-IL) greets supporters at a town hall meeting in the gymnasium at Robinson Secondary School July 10, 2008 in Fairfax County, Virginia. Obama addressed "economic security for America's Women" during the rally. Getty Images logo Getty Images 11 months ago

FAIRFAX, VA - JULY 10: Presumptive Democratic presidential candidate Sen. Barack Obama (D-IL) greets supporters at a town hall meeting in the gymnasium at Robinson Secondary School July 10, 2008 in Fairfax County, Virginia. Obama addressed "economic security for America's Women" during the rally.