NEW : `` `` Countermeasures are very difficult to deploy . '' failed to deploy during test . Missile launched from California ; interceptor launched from Alaska . the Missile Defense Agency critics have long complained previous tests did n't involve decoys . Officials told CNN on Thursday that Friday 's test would be the most realistic of 13 missile shield system tests conducted to date . President-elect Obama has said he 'll support missile defense systems if they work .
NEW : `` `` Countermeasures are very difficult to deploy . '' failed to deploy during test . Missile launched from California ; interceptor launched from Alaska . the Missile Defense Agency critics have long complained previous tests did n't involve decoys . President-elect Obama has said he 'll support missile defense systems if they work .