Now that Tony Blair has been defeated over proposals to extend the time that the police could detain terror suspects without charge from a fortnight to three months, it may be a good time to tell a story about a terror suspect who turned out to be innocent.
Apparently after Jean Charles de Menezes had been gunned down in Stockwell tube station, the Commissioner of the Metropolitan Police phoned the Home Secretary.
"Terrible news," he said. "We've shot a Brazilian at a tube station".
"Oh no," answered the Home Secretary. "How many is a brazzillion?"