A misaligned missile battery, miscommunication between troops and their commanders and a decision to fire without authorization all led to Iran’s Revolutionary Guard shooting down a Ukrainian jetliner in January, killing all 176 people on board, a new report says. The report released late Saturday by Iran’s Civil Aviation Organization comes months after the Jan. 8 crash near Tehran. Authorities had initially denied responsibility, only changing course days later after Western nations presented extensive evidence that Iran had shot down the plane.