In this Wednesday, Aug. 12, 2009 photo, Steve Powers, with the City of Philadelphia Mural Arts Program works on one of his murals in the Love Letter project set along the Market Street El train line in Philadelphia. In one section of west Philadelphia, every day is Valentine’s Day. Dozens of “love letter” murals brighten the walls along nearly 20 blocks of elevated transit tracks. That makes the El a “love train” _ and, for one couple, the perfect place for a wedding. (AP Photo/Matt Rourke)