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.
The cause of ridges in fingernails can be an early sign of a health concern that may need addressing or simply just an age thing.As you get older your nails tend to naturally form vertical ridges and become a little more brittle, dehydration from your body producing less and less natural oils.he cause of ridges in fingernails can be an early sign of a health concern that may need addressing or simply just an age thing.