A United airlines plane was traveling slow when it clipped the tail of a Delta plane parked on the tarmac at Boston's Logan International Airport. WATCH FULL EPISODES OF WORLD NEWS TONIGHT: abc.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: bit.ly/3iQLwPp #WNT #FAAInvestigation #UnitedAirlines #Delta #CloseCall