United Airlines plane evacuated after a teenager sent a picture of an Airsoft gun to other passengers onboard via Airdrop

A San Francisco International Airport spokesperson says all passengers were re-screened after de-boarding but the teen was not allowed back onboard. A United Airlines flight was evacuated ahead of take-off at San Francisco International Airport on Thursday after a teenager sent a picture of an Airsoft gun to other passengers onboard via Airdrop, an iPhone…