This is a suicide move that isn't for the faint of heart. Equip yourself with scout armor and energy pack, plasma rilfe, chaingun, whiteout granades & mines then take a Shrike or wildcat depending on what you want and how good you are and the terrain. when you are really close to the base, make sure you have some turbo, aim beside the entrance and then charge as if satan was chasing you. Jump off before you hit the wall and the defense turrets sould go for the Wildcat/shrike. Grab the flag and when you hit the entrance again turn round and run backwards, lay the mines, and finally throw the granades, now use the jetpack to get back to the base.