Drought River Shipping

December 18, 2012 - 4:33 PM
Barges with excavating machinery remove rocks on the Mississippi River Tuesday, Dec. 18, 2012, in Thebes Ill. The Army Corps of Engineers is delaying the use of explosives to blast away treacherous rock pinnacles on the Mississippi River because crews are having so much success removing the rocks with excavating machinery. (AP Photo/Seth Perlman)