What started America's secret program to develop a nuclear weapon?

The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II. ... The Manhattan Project was started in response to fears that German scientists had been working on a weapon using nuclear technology since the 1930s—and that Adolf Hitler was prepared to use it.

answer; i believe the two groups were irish immigrants and chinese immigrants;

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.