Past means -ed. Present means am, is, are and -ing. Future means not yet happened
The reason that President Harry Truman order the Atomic
Energy Commission to produce a hydrogen bomb was because President Truman had
hoped that it would restore the advantage of the United States over the soviet
union by which he ask them to produce hydrogen bomb that would be 1,000 times
powerful than the atomic bomb.
United States train travel had changed dramatically by this time, since the transcontinental railroad had been completed, which stretched all the way from the Atlantic to the Pacific.
Answer: Please see below
Explanation: During the cold war ,the House Un-American Activities Committee (HUAC) was created as an investigative body of the United States House of Representative to investigate disloyal Americans who were termed Communist because of the Red Scare that caused tension n America due to the belief that some communists within and outside America were planning to destroy America.
Also McCarthyism became popular during the Red scare because it brought about unessessary and unlawful charges against many Americans especially those in government , labour unions, and those in entertainment based on assumptions
that many of them were Communist thereby increasing fear and suspicion among the American people.
