By Arshad Mohammed and Jan Lopatka PRAGUE (Reuters) - The United States and the Czech Republic signed an agreement on Tuesday to build part of a U.S. missile defence shield, prompting Russia to say that if deployed it would respond with "military-technical methods". The U.S. and Czech foreign ministers toasted with champagne after signing the accord to place a tracking radar southwest of Prague as part of a system to protect against the perceived threat of missile attack from countries such as Iran. But Russia, in a statement reminiscent of the Cold War, warned the United States against deploying a missile defence shield close to its borders. "If the real deployment of an American strategic missile defence shield begins close to our borders, then we will be forced to react not with diplomatic methods, but with...
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