Former U.S. President George H.W. Bush celebrates both his 88th birthday and the release of a HBO documentary about his life.<br/> <br />SOUNDBITE: President George H.W. Bush, former president, saying (English):<br/> <br />"This is a big day for the Bush's - we got a lot of happy things in our lives at this old state but this film and having so many friends around is great."<br/> <br />Family and friends gathered in Kennebunkport, Maine for the festivities.<br/> <br />The documentary called "41" reflects on Bush's position as the United States' 41st President and also shows the former leader reflecting on a life that took him from a World War II navy aviator to the White House.<br/> <br />The movie was filmed over a 17-month period at Bush's summer home and at his presidential library in Texas.<br/> <br />On the red carpet Bush talked about the importance of family.<br/> <br />SOUNDBITE: President George H.W. Bush, former president, saying (English):<br/> <br />"I said, years ago they said, 'Well, what are you proud of?' And I said, 'Well, my kids still come home', and that's true today, I mean they come here."<br/> <br />Bush served as president from 1989 to 1993.<br/> <br />Although he published a collection of letters and diary entries in 1999, he has not written about his years in power.<br/> <br />Alicia Powell, Reuters.