Look, you are far more likely to die in an accident or from a disease. Think of how many Marines, Legionnaires, Soldiers, and more have served in Iraq and Afghanistan, hundreds of thousands to millions have served. US casualties around, slightly less than 6,000, have been killed in Iraq, the theater I served in in 2003, 2004, and 2005. Do the math 6,000 divided by 1,000,000 = it equates to .006%
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Be more concerned about drunk drivers, walking the streets of London or Chicago or any number of large cities, is far, far more dangerous.