boston marathon bombing incident that unfortunately killed way too many people, as well. all right, nick. we'll stay in close touch with you. nick paton walsh in dagestan. a suspected militant leader the target of a air strike in southern somalia last night, according to a u.s. military official who describes the target as a senior leader with ties to al qaeda and al shabaab. that's somalia's the al-qaeda fall i can't tell. it's not confirmed whether the target was killed. last week the united states and the european union eased sanctions on iran. all this as part of an interim deal aimed at reining in the country's nuclear program. but not everyone is on board with the obama administration's approach, and it's expected to come up tomorrow night when the president delivers his state of the union address before a joint session of congress. jim sciutto has been on the ground for us in tehran, working his sources there. getting some new information. we're going to be checking in with jim to get a little sense