“I appreciate the fact that she is on the ground, safe and sound. And I don’t think she knows just how worried some of us were,” Romney told the paper. “When you have a fire in an aircraft, there’s no place to go, exactly.”

Romney said the biggest problem in a distressed aircraft is that “the windows don’t open. I don’t know why they don’t do that. It’s a real problem. So it’s very dangerous.”

The main reason airplane windows don’t open is because there isn’t enough oxygen at cruising altitude to keep passengers alive. (The fear of window or cabin failures, which would lead to potentially fatal hypoxia, is why many planes are equipped with emergency oxygen masks.)