together. we may see the fruits of an artistic collaboration between kanye west and taylor swift. those are some of our top stories on thursday, february 12th. >> announcer: from abc news, this is "world news now." we do have to start this half hour with president obama's proposal to use military force in the battle against isis. >> at the same time the president is ruling out large-scale u.s. combat operations like those in iraq and afghanistan. abc's martha raddatz is in the region reporting from iran. >> reporter: as coalition air strikes pound isis targets across syria and iraq, more than 2,300 so far, president obama says it's not enough. >> with violent groups like this there is only one option. >> reporter: the president is asking congress to authorize a three-year military assault on isis, including limited ground combat operations. that could mean placing some special ops troops alongside front line iraqi forces. but obama is ruling out another