I was over at my Dads house and 
"Good Morning Vietnam" came on.  We watched it and commented on it.  My Dad remembers listening to "GOOOOOOD MOOORING VIETNAM"  on his first tour as an 
MP when it was broadcast out of 
Saigon.  He also talked about the private and public persona's of the people that came there to do shows.  As always it is good to visit Dad.
       When I got home I had a bit of free time and figured that I would do a bit of research on this show.  It was filmed in Thailand and they have a lot of American equipment from that time it adds to the realism to the movie.  Everybody has seen Robin Williams as Adrian Cronauer, but thereal Adrian is a different personality.
   In the movie:
Good Morning, Vietnam is a 1987 American 
comedy-drama film set in 
Saigon during the 
Vietnam War, based on the career of 
Adrian Cronauer, a 
disc jockey on 
Armed Forces Radio Service (AFRS), who proves hugely popular with the troops serving in 
South Vietnam, but infuriates his superiors with what they call his "irreverent tendency." The film was written by 
Mitch Markowitz and directed by 
Barry Levinson.
Most of Williams' humorous 
radio broadcasts were 
improvised.
[1] Williams was nominated for an 
Academy Award for 
Best Actor in a Leading Role. The film is number 100 on "
AFI's 100 Years…100 Laughs."
    Here is some tidbits about the real Adrian Cronauer: 
Military service
Cronauer co-wrote the original story for the film 
Good Morning, Vietnam, which was based on his experiences as a Saigon-based deejay during the 
Vietnam War, where he served from 1965 to 1966.
[4] His program was known as the "Dawn Busters
Adrian Cronauer is no Robin Williams. He knows Robin Williams; they're friendly. But he's no Robin Williams.
Cronauer, who keynotes this year's IWCE 2005, will be forever  linked with the manic comic thanks to the brilliant riff Williams turned  on Cronauer's military service memories in the movie “Good Morning  Vietnam.”
“If I were half as funny as Robin Williams, I'd be out in Hollywood  going na-noo, na-noo and making a million dollars,” said Cronauer in a  mellifluous voice that immediately identifies him as a veteran of the  radio booth. “Once people get to know me, they realize very quickly that  I'm not Robin Williams, and it doesn't seem to bother them after that.”
Unlike Williams' disruptively manic disk jockey, Cronauer is a  “lifelong card-carrying Republican” who took active roles in both the  Dole and Bush/Cheney presidential campaigns. Another big difference  between the two:while the movie's Cronauer character always seemed a  hairline from full military establishment ostracization — or worse — the  real-life Cronauer played within the bounds of the Armed Forces Radio  Service (AFRS) format.
“I was faced more with apathy than opposition,” recalled Cronauer,  who developed his morning radio shtick listening to Rege Cordic's radio  shows in Pittsburgh in the 1950s. “That meant I wasn't doing exactly  what Robin Williams did. He did a lot of one-liners. Mine was more  situational humor.”
Cronauer honed the morning gig at Iraklion Air Station, evolving a  “calm, matter-of-fact ‘Good Morning Iraklion’” into the Howard Dean-like  primal yell immortalized by the movie.
Cronauer's deadpan delivery hides a quiet sense of humor that will  never be confused with Williams' mania. That sense of humor seeped  through the material he compiled about his Vietnam experiences and drew  the attention of the comic actor and his agent, Larry Brezner, who  bought an option on a 1979 screenplay Cronauer wrote as a TV sitcom.
Before Brezner and Williams stepped in, rejection was a general rule for the project.
“I guess it was just a little too close in time; nobody believed you could do a comedy about Vietnam,” he said.
But Williams saw the potential.
“He read it and said, ‘Oh, disk jockey, [a] chance to do all my  comic shtick,’” Cronauer said. “Every year they'd renew the option.  About four years later, they called me up and said, ‘We've decided to  throw away the original and start over again.’”
Cronauer went to Hollywood, spilling his guts about his experiences in Vietnam.
“It went through five different versions. I'd noodle some  suggestions for additions and deletions and changes; a few of them they  accepted; most of them they ignored,” he said.
The end product had audiences laughing, and Cronauer, sitting in a screening room watching it, amazed.
“‘Son of a gun,’” he recalled thinking, “‘they actually made a movie out of this thing.’”
Perhaps most important, the movie gave the  disk-jockey-soon-to-turn-lawyer a bully pulpit for his job today as  special assistant to the director of the Pentagon's POW/MIA Office. It's  a job he took because of his political connections and his desire to  help his fellow veterans and their families.
“When the [first term George W. Bush] administration came in, they  asked if I wanted to join them. Their thinking was that I'm a  high-profile veteran and well-known in the veterans' community,” he  said.
He was mulling the offer when terrorists brought down the World  Trade Center towers and got him thinking about rejoining the military.  Instead, he says, he followed his wife's advice and entered public  service.
       You can read more  
here