A Southwest passenger says they felt their lungs 'burning' after the cabin filled with smoke mid-flight

• A Florida-bound Southwest flight was forced to make an emergency landing in Cuba on Sunday.
• The plane's cabin filled with smoke after the Boeing 737 was hit by birds.
• A passenger told NBC's "Early Today" show they felt their lungs "burning" in the smoke.

A Southwest Airlines passenger said they felt their lungs "burning" after the cabin filled with smoke on a flight from Cuba to Florida.

On Sunday, Southwest flight 3923 from Havana to Fort Lauderdale was forced to make an emergency landing after suffering bird strike damage, the airline and the Cuban aviation regulator said.