2 x 7700 squawks on a planes headed for JFK
Coincidental emergencies it would appear. Kuwait had smoke in cabin, AF had technical incident in cockpit - on another website said crack in windscreen
http://www.dailymail.co.uk/news/article-2216304/US-bound-flights-return-Heathrow-Paris-suffering-simultaneous-mid-air-emergencies-British-airspace.html?openGraphAuthor=%2Fhome%2Fsearch.html%3Fs%3D%2 6authornamef%3DAnthony%2BBond%2B