From Captain America to Spider-Man, superheroes took over Children's Hospital of Pittsburgh of UPMC to clean the windows outside. The window washers for Allegheny Window Cleaning Inc. have been doing this for six years. (Video by Darrell Sapp/Post-Gazette) #Pittsburgh #PGH #412 #superheroes #CaptainAmerica #SpiderMan #Batman #Superman #windowwashers #ChildrensHospital #UPMC #PGPhotos