Russia, Saudi Arabia, Ukraine, Serbia and the Republic of Abkhazia. Each of these countries use a flat tax system.
Dr. Ben Carson's Biblical tithe plan is essentially a 10% flat tax. Just like in Albania, Kazakhstan, Turkmenistan, Mongolia, and the Republic of Abkhazia.
More countries that have a flat tax system (Wiki page)
As Mourning Begins, Deadly B-52 Crash Highlights Age of Bomber Fleet
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Investigators are just beginning to determine what went wrong, but the Air
Force has struggled to maintain the planes, which were first introduced in
1955.
52 minutes ago