A U.S.-made Patriot missile is launched during an annual exercises in Ilan County, 49 miles west of Taipei, Taiwan, on July 20, 2006. Patriot missile systems have long been a hot ticket item for the U.S. and allies in contested areas of the world as a coveted shield against incoming missiles. In Europe, the Middle East and the Pacific, they guard against potential strikes from Iran, Somalia and North Korea. So it was a critical turning point when news broke this week that the U.S. has agreed to send a Patriot missile battery to Ukraine (AP Photo/File)
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