On Oct. 14, two USAF high-flying U-2 reconnaissance aircraft photographed portions of Cuba and analysis of these photos confirmed that bases were being constructed for intermediate-range missiles within striking distance of the United States.

President John F. Kennedy placed the U.S. armed forces on alert for whatever action might be necessary as USAF U-2 and RF-101 flights over Cuba continued, the latter aircraft sometimes flying at tree-top level.

On Oct. 22, President Kennedy publicly announced  details of the critical situation and declared that "...a strict quarantine on all offensive military equipment under shipment to Cuba is being initiated."