May 1, 2015 7:54 pm Philly's 2nd-Most Famous Running Stairs As runners prepare for the Blue Cross Broad Street Run, some elect to train by running up stairs — but not the ones at the Philadelphia Museum of Art. US & World Videos 3:04 PurpleStride event in Philly raises money for those battling pancreatic cancer 3:27 ‘Take a Breather' and run to help battle against cystic fibrosis 1:49 How much time do you spend on your phone each week? Keith Jones, Erin Coleman talk screen time 2:52 Join the fight for ovarian cancer treatment and research at the Sandy Sprint 3:13 Movement, memory and Parkinson's awareness