Mills bomb Britain adopted grenades that contained segmented coiled wire in smooth metal casings. The No. 36M Mk.I remained the standard grenade of the British Armed Forces and was manufactured in the UK until 1972, when it was completely replaced by the L2 series. The 36M remained in service in some parts of the world such as India and Pakistan, where it was manufactured until the early 1980s. Mills bombs were still being used in combat as recently as 2004 e.g. the incident which killed US Marine Jason Dunham and wounded two of his comrades. The Mills bomb was developed into a
Iron mining in the United States produced 3.66 billion tons of ore, about 70 percent of which came from the Mesabi Range. Totals through 1965 were: The largest production of US iron ore outside the Great Lakes districts was the Birmingham, Alabama district. Sedimentary iron ore in the Red Mountain formation of Silurian age was first used to make iron in 1864. Production was small until 1881, when major steelmaking began in Birmingham. The last iron mine shut down in 1975, after the district had produced 376 million long tons of ore. Iron mining in the United States Iron mining in the United States produced 42.5