French billionaire and politician Olivier Dassault was killed in a helicopter crash Sunday. The 69-year-old was the scion of the Dassault aircraft-making family. President Emmanuel Macron paid tribute to a captain of industry who "never stopped serving our country". Dassault died when his aircraft crashed near Deauville in northern France, AFP reported quoting parliamentary and investigation sources. He was the son of Serge Dassault and grandson of Marcel Dassault, who built up one of the biggest family fortunes in France.