With the shock and horror from Newtown giving way to anger and calls for action, President Barack Obama will announce his first concrete steps Wednesday in addressing the raging debate about gun policy. Obama is expected to announce that Vice President Joe Biden will lead an inter-agency process to develop policy in the wake of the Connecticut elementary school massacre. White House aides say Obama won't announce major policy decisions Wednesday, but will outline his administration's path forward. "These tragedies must end. And to end them, we must change," Obama told a packed auditorium at Newtown High School on Sunday.