Pelican

The Dropship 77-Troop Carrier (abbreviated D77-TC), more commonly known as the Pelican, is an extremely versatile craft used by the United Nations Space Command, mainly for the pickup and transportation of personnel, vehicles and equipment, although it can also be used as a powerful support gunship.

Pictures
http://images2.wikia.nocookie.net/halo/images/7/7e/Pelicandrop.jpg