Probiotics such as bifidobacteria are typically used in cases when a disease occurs or might occur due to a kill-off of normal bacteria. For example, treatment with antibiotics can destroy disease-causing bacteria, but also normal bacteria in the GI (gastrointestinal) and urinary tracts.
The 3-place Hiller Model 360, military H-23 Raven, was based on the U.S. Navy UH-12, which was first flown in 1948. The H-23 Raven performed as a utility, observation, and MedEvac helicopter during the Korean war.
North Korean leader Kim Jong-un flew a light aircraft built in North Korea in March, according to a video of his military activities for that month released by Korean Central Television (KCTV). In the footage, Mr Kim first inspects the plane before appearing to pilot the aircraft as it takes off.