Philadelphia October 30, 2017 12:03 pm Thousands to Gather for Philadelphia Heart Walk Heart Disease is the No. 1 killer of Americans, but this weekend you can help make a difference. The 2017 Philadelphia Heart Walk is happening Saturday at Citizens Bank Park. 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