Analysis - With training and partnerships, U.S. military treads lightly in Africa

DIFFA, Niger (Reuters) - On a dusty training ground in Niger, U.S. Special Forces teach local troops to deal with suspects who resist arrest. "Speed, aggression, surprise!" an instructor barks as two Nigeriens wrestle a U.S. adviser out of a car.

The drill in the border town of Diffa is part of Operation Flintlock, a counter-terrorism exercise for nations on the Sahara's southern flanks that the United States organises each year. Washington's aim is to tackle Islamist militants in the Sahel region while keeping its military presence in Africa light.