PARIS — The French Navy is toughening crew drills to better prepare sailors for the stress of coming under fire, following deployments to the Red Sea where Houthi rebels targeted Western warships and commercial traffic with drones and ballistic missiles. The navy is experimenting with its simulator drills to put crews in “increasingly stressful situations,” said Capt. Jérôme Henry, the head of training for the navy’s surface personnel, at the Paris Naval Conference this week. Henry said he’s