Watford teen George Duke-Cohan, 19, sparked nationwide panic and a transatlantic investigation after sending UK and US schools threatening emails, leading to hundreds being evacuated.
He also tricked a US airport, saying an inbound flight had been hijacked.
Duke-Cohan was jailed for three years at Luton Crown Court.
His arrest at his home in Watford, Hertfordshire, followed an investigation by the National Crime Agency in the UK, with help from the FBI.
https://www.bbc.co.uk/news/uk-england-beds-bucks-herts-46482790
He also tricked a US airport, saying an inbound flight had been hijacked.
Duke-Cohan was jailed for three years at Luton Crown Court.
His arrest at his home in Watford, Hertfordshire, followed an investigation by the National Crime Agency in the UK, with help from the FBI.
https://www.bbc.co.uk/news/uk-england-beds-bucks-herts-46482790