All passengers are safe after two planes were forced to make emergency landings shortly after taking off from San Francisco International Airport Wednesday night. United Airlines says one of their planes hit a bird as it took off for Orange County and made a safe landing back at SFO. Passengers were transferred to another plane and have since reached their destination. The second incident involved a Lufthansa plane that was headed to Munich, Germany. Officials believe it was an engine fire that forced the plane to return to SFO just over an hour after taking off.