A passenger tried to enter the cockpit of a Virgin Australia Airlines plane travelling from Brisbane and the pilot called it a "hijack", an Indonesian transport official told local station Metro TV.
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"Our ability to pre-empt or respond to threats will be eroded if we don't keep up with our adversaries."
"You are one of the silence breakers and we all owe you a debt of gratitude."
Maximum temperature 11 C (52 F).