I picked up a book recently called Operation Hollywood, which looks into the ways the Pentagon forces Hollywood studios to rewrite movies in exchange for cooperation on the production. There are some really ridiculous examples, like the Army objecting to Forrest Gump showing his butt to LBJ, and some frightening ones, like the Air Force trying to get the producers of Thirteen Days to rewrite history so General LeMay wouldn't come off like warmonger. (In both cases the producers decided to forego Pentagon aide.) And in all this, there's a chapter on TVH with some information I've never heard before. Apparently in the original script, the Bird of Prey's transporters were completely inoperable and Chekov and Uhura had to sneak into the carrier Enterprise the hard way. There was going to be a sequence with them phasering their way through fences, stunning guards and stealing key-cards to gain access to the nuclear reactor. Chekov was going to heroically stay behind to distract the marines while Uhura escaped, and then get shot when he tried to get away. The hospital scene was also going to be significantly different, with Navy shore patrol guarding the operating room and chasing Kirk and company through the hospital instead of SFPD. Since the transporters still weren't operational, the sequence would end with Sulu picking them up on the roof with the Huey and Kirk shooting at the Navy guards. When the Pentagon saw the script, their response was, "This makes us look too incompetent. Why don't you just have them beam in and out?" It's weird to think of Star Trek producers kowtowing to Pentagon demands, but I think the changes were probably for the best. Although it would've been fun for Koenig and Nichols to get some action, I don't think the movie really needed it, and indeed it might've ground the story to a halt. Plus the joke of the cops finding an empty elevator is a more satisfying conclusion a shootout on the roof.