San Antonio, New Mexico learned the hotel trade there. Hilton was one of the original legislators in the newly formed state of New Mexico, and founded the Hilton Hotels Corporation. San Antonio is about 28 miles from Trinity Site, where the first nuclear bomb was detonated on July 16, 1945. Residents reported tremors like an earthquake and the town received some of the remnants of the mushroom cloud, resulting in some radioactive contamination of the area, which faded quickly and does not persist today. The town was the meeting place for the scientists who detonated the bomb. San Antonio, New Mexico San Antonio is
Mark 4 nuclear bomb The Mark 4 was in diameter and long, the same basic dimensions as Mark 3. It weighed slightly more at , depending on the specific Mark 4 version. (Mark 3 weighed .) In addition to being easier to manufacture, the Mark 4 introduced the concept of in flight insertion (IFI), a weapons safety concept which was used for a number of years. An IFI bomb has either manual or mechanical assembly, which keeps the nuclear core stored outside the bomb until close to the point that it may be dropped. To arm the bomb, the fissile nuclear materials are inserted