In the early 1950s, at the height of the Cold War, work began on upgrading Couvron Air Base to accommodate a US Air Force base. This was to be Laon-Couvron Air Base, which became fully operational in 1954. Many American servicemen and their families settled there: more than 200 of them settled in the new housing estate built on the outskirts of Laon and called "Marquette-sous-Laon", or cité Marquette. And it was because this nearby hill on the Crépy heights welcomed all these expatriates for picnics on Sundays that this site - formerly known as Mont Sérival - quite naturally received its name as a tribute to this American presence after the murder of President John Fitzgerald Kennedy at the end of 1963. They're gone now, but you can still take a stroll up this wooded hill and think about the atmosphere that must have reigned here some sixty years ago!
When you're there, bear in mind that this place may well have been trodden by one of the legends of US indie rock, Don Fleming*, who as a child lived for a few months on the Couvron base, his military father being stationed there... * founder of the bands Velvet Monkeys and Gumball, and producer of Sonic Youth and Hole, among others!