White blood cells are produced in the bone marrow. They are released into the bloodstream and travel wherever they are needed. Low levels of neutrophils occur when the bone marrow cannot replace them as fast as needed. In babies, the most common cause is infection. A very severe infection may cause neutrophils to be used up quickly. It may also prevent the bone marrow from producing more neutrophils. Sometimes, an infant who is not sick will have a low neutrophil count for no obvious reason.
The Mikoyan MiG-29 (Russian: Ð¼Ð¸ÐºÐ¾ÑÐ½ Ð¼Ð¸Ð³-29; NATO reporting name: Fulcrum) is a fourth-generation jet fighter aircraft designed in the Soviet Union.
The Sukhol Su-27 is a twin-engine fighter plane built by the former U.S.S.R., in an attempt to outdo similarly advanced American aircraft. The plane made its first flight in May 1977, and officially entered service with the Soviet Air Force in 1985. The aircraft can reach a maximum supersonic speed of Mach 2.35 (1,550 mph, or 2,500 km/h), which is 2.35 times the speed of sound. The Su-27 earned a reputation of being one of the most capable fighters of its time, and some remain in military use in Russia, Belarus and the Ukraine.