Aug. 9, 1961 - Premier Khrushchev warned today that the Soviet Union was capable of constructing a rocket with an explosive warhead equivalent to 100 million tons of TNT. He asserted that the Soviet Union wanted peace and disarmament and preferred to sink all weapons into the sea. But, he added, if war breaks out, the Soviet Union will utilize all armaments at its disposal. U.S. officials said that the warhead Mr. Khrushchev described was indeed possible and that it would be 20 times more powerful than the largest warheads of U.S. missiles. They said the U.S. had not tried to make bigger bombs because existing weapons were powerful enough to wipe out cities with a single strike.