Attacks on aid challenge Afghan reconstruction

KABUL (Reuters) - Food convoys hit by rocket propelled grenades along major highways. A U.N. polio vaccination team targeted by a suicide bomber. A spurt in kidnaps.

Attacks on aid agencies in Afghanistan have spiraled this year, hampering reconstruction efforts just as the country faces both frustration from ordinary Afghans over slow development as well as one of its worst food crises and droughts in years.