I am guessing with my age I probably do not qualify for a SEAL Challenge Contract because by the time I would ever get to a second or third attempt at BUD/s (if it were necessary) I would be older than 28. Looking to enlist with the quickness, because I am sure there is a backup....
German for X rays where 'X'  means   'unknown'. In Europe X-rays are known as Roentgen rays.    X-Radiation is a form of electromagnetic radiation having a  wavelength of   0.01 to 10 nanometers.NS2: The name x-ray was applied to radiation in the same frequency as gamma radiation but which originate from a man-made source.
Bone Mineral Densitometry. Synonym/acronym: DEXA, DXA, SXA, QCT, RA, ultrasound densitometry. Dual-energy x-ray absorptiometry (DEXA, DXA): Two x-rays of different energy levels measure bone mineral density and predict risk of fracture. Single-energy x-ray absorptiometry (SXA): A single-energy x-ray measures bone density at peripheral sites.