unite nations unite nations security council thursday approve creation u.n. investigative team collect preserve store evidence iraq act islamic state may war crimes crimes humanity genocide 15-member council unanimously adopt british-drafted resolution year negotiations iraq ask secretary-general antonio guterres establish team support domestic efforts hold militants accountable british minister state middle east alistair burt say britain would provide 1.3 million help establish team never adequate recompense force endure wanton brutality islamic state dead bring back resolution mean international community unite belief least accountability burt tell council use evidence collect team venues international court would determine agreement government iraq case-by-case basis evidence primary use iraqi authorities follow competent national-level court accord resolution thousands foreigners fight islamic state already prosecute return home u.n. experts say june last year islamic state commit genocide yazidis syria iraq destroy minority religious community kill sexual slavery crimes international human right lawyer amal clooney nadia murad young yazidi woman enslave rap islamic state fighters mosul long push iraq allow u.n. investigators help clooney murad security council thursday vote describe resolution milestone fight justice nadia exchange warm smile saw 15 hand go chamber clooney tell reuters long time come meantime evidence lose lose opportunities along way fact resolution mean justice finally possible say murad say happy council act security council meet annual gather world leaders u.n. general assembly look ahead next step really next step define whether piece paper acquire today become real justice grind yazidis victims isis clooney say iraq foreign minister ibrahim al-jaafari officially request international help letter security council last month council could establish inquiry without iraq consent britain want iraq approval islamic state self-proclaimed caliphate effectively collapse july u.s.-backed iraqi force complete recapture mosul militants capital northern iraq nine-month campaign u.n. team collect evidence islamic state crimes iraq