"Good evening, my fellow citizens. The government, as promised, has maintained the closest surveillance of the Soviet military buildup on the island of Cuba. Within the past week unmistakable evidence has established the fact that a series of offensive missile sites is now in preparation on that imprisoned island. The purpose of these bases can be none other than to provide a nuclear strike capability against the Western Hemisphere….
"Acting, therefore, in the defense of our own security and of the entire Western Hemisphere, and under the authority entrusted to me by the Constitution as endorsed by the resolution of the Congress, I have directed that the following initial steps be taken immediately: First: To halt this offensive buildup, a strict quarantine on all offensive military equipment under shipment to Cuba is being initiated. All ships of any kind bound for Cuba from whatever nation or port will, if found to contain cargoes of offensive weapons, be turned back. This quarantine will be extended, if needed, to other types of cargo and carriers."
—From a radio and television address by President John F. Kennedy, 22 October 1962—
"Now, therefore, I, John F. Kennedy, president of the United States of America, acting under and in virtue of the authority conferred upon me by the Constitution and statutes of the United States, in accordance with the aforementioned resolutions of the United States Congress and of the Organ of Consultation of the American Republics, and to defend the security of the United States, do hereby proclaim that the forces under my command are ordered, beginning at 2:00 Greenwich time October 24, 1962, to interdict, subject to the instructions herein contained, the delivery of offensive weapons and associated material to Cuba.
"For the purposes of this Proclamation the following are declared to be offensive material: Surface-to-surface missiles, bomber aircraft, bombs, air-to-surface rockets and guided missiles, warheads for any of the above weapons, mechanical or electronic equipment to support or operate the above items, and any other classes of material hereafter designated by the Secretary of Defense for the purpose of effectuating this Proclamation."
—Proclamation signed by President Kennedy, 23 October 1962—