Flight Grounded as Passenger’s Alarming Threat Triggers ‘Lockdown Protocol’

Kevin Carter / Getty Images A Seattle-bound commercial flight was abruptly halted on the tarmac and forced into an emergency cockpit lockdown after a passenger allegedly threatened to hijack the jet. The alarming situation unfolded on Alaska Airlines Flight 305 as the Boeing 737 taxied for departure at Miami International Airport. In dramatic air traffic control audio, the pilot alerted controllers to escalating cabin chaos. “Ramp, Alaska 305, we have set the parking brake, and we have a…