The Afghan president recognizes the critical role the U.S. military plays in his government's continued survival.
This map shows the approximate locations of U.S. Carrier Strike Groups and Amphibious Ready Groups.
Luanda will try to relieve the pressure on the country's political elite.
Economic relations will be emphasized during U.S. President Barack Obama's visit with Central American leaders.
Washington wants to prove its ability to degrade Iran's most potent deterrent against attack.
Washington is examining alternatives to a large ground operation in Syria.
Future cooperation between the two countries will focus heavily on bilateral economic possibilities.
The debate over whether Washington should intervene continues.
As soft targets, railways will continue to attract militant attacks.