"Double Agent Tricycle" ⟳⟳⟳

A little history... "Duško Popov" may not sound familiar to the most ears or minds. If you have seen 007 movies, which are fictional, of course, the creator of the 007 character, Ian Fleming, found a lot inspiration for his books from the stories and anecdotes of "Tricycle".

" Casino Royal"

"Popov was a Serbian triple agent of VOA (code named "Duško"), MI6 (code named "Tricycle") and the Abwehr (code named "Ivan"). Fleming knew Popov and followed him in Lisbon, Portugal as an escort appointed by the MI6, witnessing an event in the Estoril Casino where Popov bluffed by placing a bet of $40,000 ($800,000 in 2023 dollars[44]) in order to cause a rival to withdraw from a baccarat table: Fleming used this episode as the basis for Casino Royale."

A quotation from Wikipedia.