Singing Christmas Tree upon the location. Since then, the singing Christmas tree concept has spread to Canada, the Philippines, South Korea, Switzerland and Sri Lanka. The most attended tree takes place in Knoxville, Tennessee, with 60,000 attendees in 2007. The first Christmas trees came to the United States in the 1740s from Moravian (now part of the Czech Republic) settlers. In 1851, the first commercial tree lot in the United States was set up in New York City. President of the United States Franklin Pierce set up the first Christmas tree in the White House in 1856. Artificial trees were first developed in
White House Communications Agency handpicked infantrymen selected for this special duty as part of Presidential Support Duty. White House Communications Agency The White House Communications Agency (WHCA), originally known as the White House Signal Corps (WHSC) and then the White House Signal Detachment (WHSD), was officially formed by the United States Department of War on 25 March 1942 under President Franklin D. Roosevelt. The organization was created to provide secure normal, secret, and emergency communications requirements in support of the President. The organization provided mobile radio, Teletype, telegraph, telephone and cryptographic aides in the White House and at "Shangri-La" (now known as Camp David).