Kennedy discusses how America will protect itself and its allies because
America is a strong and courageous nation.
America is a military leader in the world.
America has the strength of nuclear arms.

Why isn’t Kennedy’s call for the United States to find common ground and cooperate with its enemies a sign of weakness?
He knows that America’s adversaries will never agree to cooperate.
He knows that such cooperation is in his nation’s best interest.
He knows that no such common ground exists.