PITTSBURGH - While their husbands were off attempting to address the world's problems, Michelle Obama and the G20 spouses lunched at the 7-story Andy Warhol Museum. The museum holds the largest collection of work by Warhol, a Pittsburgh native. Some of the spouses donned aprons and tried Warhol's technique of silk-printing "Flowers" on bags as a souvenirs. The White House posted this photograph of the group admiring the Marilyns.