welcome back to philadelphia. we are live for this final day of the pope's trip to the united states. you're looking at live pictures. that's the philadelphia museum of art. the pope will be speaking there, celebrating mass at 4:00 p.m. eastern. all week he has urged americans to offer dignity and love to the poor and marginized. during his historic address to a joint meeting of congress,s pope called for an end to the death penalty in the united states. although most americans still support it. joining me now is democratic presidential candidate martin o'malley who abolished the death penalty in maryland two years ago. governor, thanks for joining us. when pope francis spoke to congress, he called for the global abolition of the death