What opportunity cost would Bill Gates, Elon Musk, Opera or La Bron James have to deal with ?

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

How did the battle of okinawa affect president truman’s decision to use the atomic bomb against japan? it showed that japan was close to surrendering. it showed that the us could not win the war without it. it showed that japan was willing to fight to the end. it showed the us could easily defeat japan.

What former head of the cuban secret service was charged with protecting the country's prime minister for nearly 50 years?