washington president barack obama say interview broadcast monday unite state provide support iraq military move take back territory islamic state expect city mosul retake eventually see iraqis will fight gain grind let make sure provide support obama say interview cbs news u.s. officials announce baghdad monday unite state deploy 200 additional troop mostly advisers iraqi troop advance toward mosul large iraqi city still islamic state control increase raise authorize u.s. troop level iraq 4,087 include special operations personnel logistics workers troop temporary rotations fight obama say provide train provide special force back gain intelligence work coalitions see continually tighten noose islamic state expectation end year create condition whereby mosul eventually fall obama say obama u.s. give support iraq fight islamic state