After the Kowloon levels,you'll have to defend the X-Wing from Sentinels using ICEMAN.Use your icebeam instead of hailstorm and target the ones closest to the plane first.Yol'll have to target each of the sentinel's 6 weak points,three in the front and another three in th back.On your first pass,sweep your ice beam over the three weak points in the front or back,then double up to knock out the ones on the opposite side.