if only they left the flamethrower lying around somewhere...
Banshees with Open Hatches
with open hatches could be seen in the very first Halo screenshot, posted
July 21st, 1999.
were shown with open hatches in many screenshots, nearly up to release date. A
posted September 6th, 2001.
inside the Pelican.
Pelican with a mounted machine gun was show in this
screenshot, posted April 28th, 2000.
You can actually
walk into this hatch underneath any pelican, and see the gun. (No tricks
Pelican Gun, and Method for getting inside, are mentioned in this post
screenshots from halo.bungie.org