Window washers trade overalls for superhero capes at UPMC Children's Hospital, "It's a beautiful day."

Some of the world's most famous superheroes traded crime-fighting for window washing Friday at UPMC Children's Hospital. It's a tradition that, for years, a group of window washers from Allegheny Window Cleaning Inc. has dressed up as superheroes while cleaning the windows to surprise patients, staff, and the community. Spider-Man, Superman, Batman, and Captain America could be seen rappelling down the side of the hospital, waving to patients and families from outside their windows as part of a special effort to lift spirits and bring smiles to children receiving care.Avengers...assemble! KDKA "Who's your favorite?" one child was asked."Spider-Man!" said the child.For the window washers behind the costumes, the day is about much more than cleaning grime."It's a beautiful day. We've been doing it for years. We really enjoy it," said Edward Hetrick, who is dressed as Superman. "My favorite part is watching the kids get super happy,