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Ukraine has changed how militaries use Patriot systems. But recent attacks prove that clever adaptations cannot overcome a shortage of interceptors. By Siobhán O’Grady and Liubov Sholudko Ballistic ...

If your credit card has a variable APR, expect it to fluctuate for a variety of reasons. For example, if you miss a payment or your credit score has dropped, the card issuer may raise your APR. But ...