Camp's two most important rule changes that diverged the American game from rugby were replacing the scrummage with the line of scrimmage and the establishment of the down-and-distance rules.[1] American football still however remained a violent sport where collisions often led to serious injuries and sometimes even death.[120] This led U.S. President Theodore Roosevelt to hold a meeting with football representatives from Harvard, Yale, and Princeton on 9 October 1905, urging them to make drastic changes.[121] One rule change introduced in 1906, devised to open up the game and reduce injury, was the introduction of the legal forward pass.