Ceremonies marking 13 years since attack held in New York, Washington.
President Obama to set out "game plan" in speech Wednesday.
Two men were convicted of raping, murdering 11-year-old girl.
The magnitude-6.0 quake is thought to be the strongest in 25 years.
Washington says Islamist group poses "long-term threat."
F.A.A. says ongoing conflict poses "serious potential threat."
Shooting of black teen by police sparked two nights of violence.
A senior U.S. health official said the outbreak was out of control but insisted it could be stopped.
Agency says group may have up to 31,000 fighters in Iraq and Syria.
The television host and comedian was best known for her acerbic wit.
Copyright © 2014. All rights reserved.