Why it may be dangerous to drink alcohol before napping on a flight

A new study in the respiratory journal Thorax suggests that the combination of alcohol and cabin pressure may threaten the health of sleeping passengers. Dr. Tara Narula joins TODAY to break down the findings and possible risks.  NBC News Health

​A new study in the respiratory journal Thorax suggests that the combination of alcohol and cabin pressure may threaten the health of sleeping passengers. Dr. Tara Narula joins TODAY to break down the findings and possible risks.