Employees and day care center have been evacuated in Silver Spring, Md.; hostages were taken.
WATCH: Obama to Announce End of Iraq Combat Operations
Seven years after American troops arrived Operation Iraqi freedom is over.
WATCH: Tapper on the End of Iraq Combat Operations
Obama warns that even though Operation Iraqi Freedom is over, the danger is not.
WATCH: Troops Remaining in Iraq on 'Changing Dawn'
Dan Harris talks to troops in Baghdad about their new mission in Iraq.
WATCH: Hurricane Earl Threatens East Coast
Hurricane watches have been issued for most of North Carolina's coast.
WATCH: Was Terror 'Dry Run' a False Alarm?
Authorities don't think the two Yemenite terror suspects even knew each other.
WATCH: Removing Ovaries and Breasts to Cut Cancer Risk
Some doctors advise the radical procedure to women with genes that increase risk
