The Anti-Concorde Project, founded by environmental activist Richard Wiggs,challenged the idea of supersonic passenger transport, and curtailed Concorde's commercial prospects. When Concorde entered service in 1976, of the 74 options (non-binding orders, from 16 airlines) held at the time of the first flight, only those for the state airlines of Britain (BOAC) and France (Air France) were taken up, so that only 20 were built, although flights were also flown for Braniff International and Singapore Airlines. It triggered research into the factors affecting the creation of sonic booms, which led to the Shaped Sonic Boom Demonstration which achieved their goal of reducing the intensity of sonic booms (by about one-third), and echoed public concern about aircraft noise that resulted in more re