World War II marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease, and the only use of nuclear weapons in war. Japan, which aimed to dominate Asia and the Pacific, was at war with China by 1937, though neither side had declared war on the other. World War II is generally said to have begun on 1 September 1939, with the invasion of Poland by Germany and subsequent declarations on Germany by France and the United Kingdom. From
Scuba diving fatalities testing. Procedures for testing rebreathers differ from those for testing open circuit equipment. Life-support equipment is an integral part of diving, and dive equipment is generally robust and reliable, but bad maintenance, design flaws, improper use, or other factors may cause or contribute to an incident. When equipment issues are not contributory to an incident, they should be excluded so that the causative factors may be correctly determined. If diving fatalities are thoroughly investigated it may be possible to determine a trigger, or root cause, for the accident. Data collection and analysis allows identification of the most common triggers and