Portrait of a Rescue: After the second explosion, Devin Wang didn't think. She just reacted. Go now. She rolled an empty wheelchair the wrong way across the Boston Marathon finish line, past the fallen flags of the world and broken glass and splintered storm fencing torn down by cops and soldiers and spectators who had clawed at the barriers with their bare hands. She smelled seared flesh and saw money littering the pavement. People's limbs had been blown off and now bills lay scattered amid the pooling blood as if a random, grisly sweepstakes had just been lost there.
