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.
Red discoloration under your fingernails can be caused by a number of conditions, some of which could be serious. Talk with your doctor or dermatologist about what may be causing the redness.Some conditions that can lead to a red or brown discoloration under your nails include the following: 1  A splinter hemorrhage.2  This vertical red or brown line under the nail can be caused by an injury, fungal infection, or nail psoriasis, or can be a sign of a heart condition. This vertical red or brown line under the nail can be caused by an injury, fungal infection, or nail psoriasis, or can be a sign of a heart condition. 2  Heart failure. 3  This can cause redness in the white half moon at the bottom of your nail. 4  Kidney disease.