Fighting grime.

James Knox | Pittsburgh Tribune-Review Window-washers from left, Mark Errico (Captain America), Jim Zaremba (Batman), Ed Hetrick (Super-Man) and Rick Boloinger (Spiderman) rappel down the side of Children’s Hospital on Monday morning, Oct. 22, 2012 as the crew of washers from Allegheny Window Cleaning Inc. rid the windows of the Lawrenceville hospital of grime.