The Carrier is a once-spawningflyingBoss in Canyon Defense 2. Upon spawning, it marks an area with a rotating alert sign with the text LANDING ZONE ALERT. Upon reaching the designated area, it airdrops a large number of Demolition Men, a comparatively smaller number of Squad Soldiers and often a Mech (determined randomly), then retreats from the battlefield. It always appears in a group, usually of three.
Often, simply building an adequate anti-air defence is sufficient to defend against Carriers, by means such as large numbers of AA Guns. This also prevents the problems caused by the Carrier's troops. Otherwise, any regular defence will suffice to get rid of the troops that it spawns, simply ignoring the helicopters themselves.