and catherine t. macarth foundation and union nk. ♪ >> and now, "bbc world news." >> it twoays of clashes, more than 150 people are dead nigeris government gins an assault on th reb else. a differen pla. the u.s defense sectary robert gates has said iraq security has improved azingly. disrupti across south aica, protests by government woerers. welcome to "bbc world news." comi up lar for you, a spectacular site -- sight, but a climate change disaster. greeland plays hosto the northern hemisphere fastest collapngglacier. whicwitch will get the job? they will make a pitch for what isrobably the most unusual work in britain. >> nigeria is no stranger to ethnic andeligious tnsion. buthe violence that has flared up the past t days in t predomintly muslim north is some of th worth for a while nw. at least 150 people ha been lled as the militarywas ordered tose all necessary means end violence sparked by islamic militant the milints have attacked t police and gernment office protesting against the weste education an