In 1971 VR-30 joined the Jet Age with two North American CT-39 Saberliners for high-speed executive airlift. In May 1973 the squadron received the first of four C-9B Skytrain II's to further improve its logistics support capability.
Vertical ridges can also be caused by nail injury and certain diseases, including rheumatoid arthritis, according to Rich. If, instead of a series of ridges, there's a single vertical streak, cautions Krant, this could be a sign of a tumor growing at the root of the nail.
Answer by jayh4884 (7). Cracked fingernails comes from multiple causes, most causes are from poor nutrition or maintenance of your fingernails. One of the major causes for cracked fingernails is due to damage to your cuticles. Besides nutrition and maintenance, trauma can also cause cracked fingernails.People who are exposed to harsh physical labor, are much more prone to crack their fingernails.add a comment.racked fingernails comes from multiple causes, most causes are from poor nutrition or maintenance of your fingernails. One of the major causes for cracked fingernails is due to damage to your cuticles.