Jason Allen; John Miller; P. Chidambaram

CBS Dallas-Fort Worth reporter Jason Allen gives an update on the fertilizer plant explosion in West Texas—where rescue workers are still looking for survivors—and says police haven't ruled out criminal behavior. CBS News Correspondent John Miller talks about photos—released by the FBI—of two suspects in the Boston Marathon bombing. Indian Minister of Finance P. Chidambaram analyzes the global economy, the influence of emerging nations, and India's growing economy.