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.
CT scan vs MRI scan. CT is the abbreviation of Computed Tomography. In CT scan X-ray beams are used to take image films. The X rays are high energy rays not visible to eye. When X-ray passes, it may be obstructed by tissues.