Passengers say they're nervous
Travel jitters are high among airline passengers following a string of on-board incidents.
A flight attendant on a San Francisco bound plane tackled a passenger who was pounding on the cockpit door Sunday evening.
Police say 28-year man was carrying a Yemeni passport.
He was arrested for interfering with a flight attendant.
Also on Sunday, passengers stopped a man trying to open the door of a Chicago-bound plane.