>> this is a military campaign is under way, how is that working out. it's not going very well three months or so in. >> reporter: it really isn't. this has been going on for a while. nothing has opinion out of limits for them fp united nations headquarter, one of the worst atrocities against the u.n. school, government buildings, houses of worship christian and muslim. every year they say they're tackling this with the help of the united states. there doesn't seem to be an end in sight.