After some time, the criminal gangs from the US migrated to Cuba and took control of the casinos. However, as the US government wanted to have a hold on Cuba, they created a security force, a secret service agency which brought crime under control. However, when Cuba planned attack on USA, the situation changed and the police force ensured that the criminal elements were controlled in the country and many of them fled to the US as the immigration rules facilitated such migration.[6]