Start the level from the beginning and progress until the part where you have to defend the ONI Tower near the end of the mission. Note: Get a jetpack from Club Errera when you destroy the jammer there, or behind the Jammer in the hospital if needed. Do not die or the jetpack will be lost. After destroying all the jammers and are told to defend ONI Tower, fly over to Club Errera in a Falcon and follow the procedure in the video.