A court heard how a bin man from Wales told his wife how he wanted to bomb a Royal Air Force base.
Aabid Ali - formerly called Darren Glennon prior to his conversion to Islam - is being sentenced at Manchester Crown Court after pleading guilty to three terror offences.
The court heard how the former binman in Wrexham had been visited by officials from the Prevent programme, but stubbornly stuck to his views of Sharia law.
Ali told his wife he wanted to bomb an RAF base, and had researched how to do so on the internet.
He also examined various Islamic State-related material, while researching GCHQ as well as security arrangements around Downing Street. He was arrested last November following the visit from Prevent officials.
Ali's sentencing hearing is ongoing.