On January 17, 1966 (the 26th day of the twelfth lunar month), an American plane collided and the hydrogen bomb it carried was lost over Spain.

On January 17, 1966, nine American aircraft participating in military exercises flew over the Mediterranean Sea near Spain. One of them, a "B52" strategic bomber, carried four hydrogen bombs. At 10 a.m., a "KC-135" tanker refueled the fleet; At 10:10, the air connection was achieved with "B52" and refueling began; Accidentally collided at 15 minutes, one engine of "B52" exploded, and the two aircraft turned into two fireballs; After the driver pushed down four safe hydrogen bombs, he abandoned the plane and parachuted.

Under the plane explosion point is the village of Palomares, Spain 1,200 people, farmers are in the fields, see the fireballs roll to the top, scared and escaped. The two aircraft fragments scattered 39 square kilometers of land and sea around the village. The four hydrogen bombs are tied under a large parachute, slow landing. When recovered, one disappeared, the United States launched 24 ships, costing $84 million, and three months later it was recovered from the seabed. These hydrogen bombs each weighing 25 million tons, equivalent to 1,250 Hiroshima atomic bombs, as long as an explosion could destroy everything within 15 kilometers of the radius, causing at least 50,000 deaths. Fortunately, the four hydrogen bombs were insured and would not explode;