Winds knocked down the main Christmas tree in Washington, D.C., whose lights Biden was scheduled to turn on celebrally on Thursday.Earlier, CBS TV reported that the National Park Service is not sure it will be possible to save the tree, and the condition of the tree has not yet been assessed. Plans to light the ceremonial lights on the tree opposite the White House on Nov. 30 are still in place.The 12-foot Christmas tree was brought to Washington from West Virginia earlier this month.Biden is the oldest president of the United States, turning 81 on Nov. 20. If he wins the election in 2024, he will be 82 when he takes office and 86 at the end of his second term. The US president himself sees his age as evidence of experience and insists on denying that he has major health problems.