WASHINGTON (AFP) - The United States drew up a plan to kill Osama bin Laden in 2007 in Afghanistan's Tora Bora region, former secretary of state Condoleezza Rice said Friday, confirming a New York Times report. The administration of George W Bush considered bombing a meeting of Al-Qaeda leaders during the summer of 2007, in what would be the last chance to kill bin Laden before the 2008 presidential election, the Times reported. Rice, in an interview with ABC News to be broadcast Sunday, confirmed the information. "There was supposedly this meeting that would take place, perhaps higher level enough for him to come, but in the end it didn't materialize," Rice told ABC. Meanwhile, US Defence Secretary Robert Gates said Friday the death of Osama bin Laden could be a "game-changer" for the US-led war effort in Afghanistan. In his first public remarks since US Navy commandos killed the Al-Qaeda founder in his hideout in Pakistan on Monday, Gates said it was too soon to say for certain what the effect of the raid might be on the nine-year-old war in Afghanistan. "I think in terms of the impact of the killing of Osama bin Laden, in terms of the situation in Afghanistan, I think that there is a possibility that it could be a game changer," Gates told service members at Seymour Johnson Air Force Base in North Carolina. The Pentagon chief suggested that the killing of Bin Laden could aggravate tensions between the Taliban insurgency, which includes spiritual leader Mullah Omar, and Al-Qaeda. "Bin Laden and Mullah Omar had a very close personal relationship. And there are others in the Taliban who have felt betrayed by Al-Qaada, that it was because of Al-Qaeda's attack on the United States that the Taliban got thrown out of Afghanistan," said Gates, according to a transcript released by the Pentagon. He added that it was "too early to make a judgment in terms of the impact inside Afghanistan, but I think in six months or so we'll probably know if it's made a difference." About 100,000 US troops are deployed in Afghanistan in a protracted counter-insurgency campaign against the Taliban, which was ousted in a US invasion in 2001 for its support for Al-Qaeda. Gates spoke a day after holding a private meeting at an undisclosed location with the team of US Navy SEALs who carried out the raid on Bin Laden's compound. No members of the US assault team were killed or wounded in the operation. "He wanted to personally and privately express his admiration and appreciation for their extraordinary service and historic achievement," Pentagon press secretary Geoff Morrell said.