CONCRETE QUESTION U.S. Navy Petty Officer 1st Class Brian Gamache, right, performs a concrete slump test, which measures moisture in cement, with an Afghan contractor, in Paktika province, Afghanistan, June 12, 2010, Gamache is an engineer for the Paktika Provincial Reconstruction Team, whose members oversee the quality of construction. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 909636-Y-UPZ49-078.jpg Photo Gallery