Gap military barracks pay tribute to comrades killed in Mali helicopter crash Gap pays a final tribute to the four commandos who died in Mali several days ago. They were among 13 killed in a helicopter collision while battling jihadists. It was the biggest single-day loss for the French military in nearly four decades, rekindling doubts about the effectiveness of France's 4,500-member Barkhane operation in Mali and four other countries in the Sahel. IMAGES