Bush and Clinton Team Up for 9/11 Memorial Fund-Raiser The odd-bedfellows tandem of George W. Bush and Bill Clinton got together again Tuesday night to promote their latest shared post-presidential cause, a memorial to the heroes of United Flight 93. The 42nd and 43rd presidents headlined a fund-raiser at the Newseum in Washington in hopes of bringing in enough money to honor the passengers who confronted hijackers and brought down their plane on Sept. 11, 2001, rather than let it be crashed into the nation's capital. "It's important to always honor courage and I think the acts of those on 93 will go down as one of the most courageous acts in the history of the United States," said Mr. Bush. The two former presidents have picked up where they off, promoting nonpartisan ventures in a partisan era. Their most prominent collaboration was the relief effort for Haiti after the earthquake of January 2010, but they have also given speeches or participated in question-and-answer sessions together, and refer to each other jokingly as lost brothers. Neither has given up his party affiliation, of course. Mr. Clinton appeared with President Obama at a Democratic fund-raiser last month and Mr. Bush informally endorsed the Republican candidate, Mitt Romney, earlier in the day. But the two have kept up the bipartisan tradition of occasionally putting aside politics after the White House, as documented in "The Presidents Club," a new book by Nancy Gibbs and Michael Duffy of Time magazine. The Flight 93 National Memorial was a natural cause for the two presidents, one that harkens back to the day when Americans joined together despite differences over politics or backgrounds. The actions of the Flight 93 passengers who stormed the cockpit to take on the Qaeda terrorists who had seized their plane proved an inspiring rallying point for a stunned nation. While September 11 memorials in New York and Virginia have been fully financed, officials said, the one in Shanksville, Pa., where the passenger jet went down, remains short of its target. Of $76 million needed for the project, $30 million has been raised from private sources and $32 million from government financing, according to Marjorie Hall, communications director for the National Park Foundation, the Congressionally chartered organization that supports the National Park Service. Another $4 million is expected from taxpayers and the presidents are aiming to find the remaining $10 million from private donors. The first phase of a memorial plaza on the 2,200-acre site was dedicated last September but plans remain for a visitors center, a learning center and a 93-foot-tall "tower of voices" containing 40 aluminum wind chimes, one for every person slain aboard Flight 93, not counting the hijackers. About 350 guests joined the two presidents at the Newseum event along with Laura Bush, the former first lady; Speaker John A. Boehner; and Ken Salazar, the secretary of the interior. David Gregory, the host of NBC's "Meet the Press," moderated the event.