Article Photos: Congress members seek investigation of Shell barge 8/13

The Crowley Marine tugboat Alert ties up at Pier 2 at 6:20 p.m. Wednesday, Jan. 2, 2012 in Kodiak, Alaska. The Alert, normally based in Prince William Sound, was one of the tugs summoned to Kodiak in an effort to keep the drilling rig Kulluk from running aground. The Kulluk ran aground on New Year's Eve. (AP Photo/Kodiak Daily Mirror, James Brooks)