DUBAI (Reuters) - Iran would enrich uranium up to 60 percent purity if negotiations with major powers over its nuclear program fail, an Iranian lawmaker said on Tuesday, in comments that may add to Western alarm about Iranian intentions. Mansour Haqiqatpour, deputy head of parliament's Foreign Policy and National Security Committee, said 60 percent enrichment would be to yield fuel for nuclear submarines, which often require uranium refined to high levels. ...