Pittsburgh Penguins hockey player Sidney Crosby skates at the Consol Energy Center in Pittsburgh Monday, April 15, 2013. (AP Photo/Tribune Review, Chaz Palla)
In this photo taken Monday, April 23, 2012, Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at Consol Energy Research and Development Facility in South Park Township, Pa. (AP Photo/Jae C. Hong)
In this photo taken Monday, April 23, 2012, Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at Consol Energy Research and Development Facility in South Park Township, Pa. (AP Photo/Jae C. Hong)
In this Aug. 18, 2010, file photo. Paul McCartney performs at the new CONSOL Energy Center in Pittsburgh. (AP Photo/Keith Srakocic, File)
