In 2009, the Lewis and Clark Trail Heritage Foundation organized a commemoration for Lewis in conjunction with their 41st annual meeting from October 3–7, 2009. It included the first national memorial service at his grave site. On October 7, 2009, near the 200th anniversary of Lewis's death, about 2,500 people (National Park Service estimate) from more than 25 states gathered at his grave to acknowledge Lewis's life and achievements. Speakers included William Clark's descendant Peyton "Bud" Clark, Lewis's collateral descendants Howell Bowen and Tom McSwain, and Stephanie Ambrose Tubbs (daughter of Stephen Ambrose, who wrote "Undaunted Courage", an award-winning book about the Lewis and Clark Expedition). A bronze bust of Lewis was dedicated at the Natchez Trace Parkway for a planned visitor center at the gravesite. The District of Columbia and governors of 20 states associated with the Lewis and Clark Trail sent flags flown over state capital buildings to be carried to Lewis's grave by residents of the states, acknowledging the significance of Lewis's contribution in the creation of their states.