licensed Wright Model B named the Burgess Model F. The military aviation school saw numerous aviation firsts. Shortly following the cancellation of an international air meet at the airport in the fall of 1912, all aviators on the field participated in a demonstration for the International Congress of Hygiene participants. On October 7, 1912, Bernetta Adams Miller became the first woman to demonstrate a flight in a military aircraft. In 1915 Cecil Peoli, one of the world's first professional aviators, died testing his 12-cylinder Rausenburger-powered biplane at College Park in preparation for New York and St. Louis cross country flights. In 1918, after a three-month trial with the War Department beginning May 15, the Post Office Department inaugurated the first Postal Airmail Service from College Park, serving Philadelphia and New York City (Belmont Park). Flights from College Park continued until 1921. The compass rose and original airmail hangar remain at the modern airport as a witness to this history. The airport code "CGS" originally referred to the airport's purpose in the 1930s as an airmail station (CGS = ColleGe Station). In 1920, Emile and Henry Berliner (father and son) brought their theories of vertical flight to the field and in 1924 made the first controlled helicopter flight. From 1927 until 1933, the Bureau of Standards developed and tested the first radio navigational aids for use in "blind" or bad weather flying. This was the forerunner of the modern Instrument Landing System used today by aircraft. In 1937 the Engineering & Research Corporation (ERCO), based across the street (Good Luck Rd, now Campus Drive) in nearby Riverdale, Maryland, used the airport to test fly the early model of the Ercoupe, an airplane designed to be spin-proof. George Brinckerhoff took over management of the Airfield and ran it from 1927 until 1959, hosting numerous airshows and teaching hundreds of pilots to fly during his tenure. The Maryland-National Capital Park and Planning Commission (M-NCPPC) purchased the Airport in 1973 and it was added to the National Register of Historic Places in 1977. A small museum was established in 1981 drawing 400–500 visitors on a weekend. Today it is run as both a historic site and operating airport whose history is depicted in the College Park Aviation Museum. Since the 9/11 attacks, and owing to the airport's proximity to the national capital, the operations of the airport have been severely restricted by the Transportation