It was a time of changes within the US mob, meaning as I previously said Costello probably became official on that same meeting and there were also problems around the midwest at the time, especially in Chicago, and at the same time they were heavily invading both Cuba and Las Vegas. I know that some researchers will say that the US mob had ops or interests in Cuba since the 1920's and they are not far from the truth, BUT by the 1940s the situation became both quite serious and lucratuve at the same time.