President Trump has decided to withdraw from another major arms control accord, according to senior administration officials, and will inform Russia on Friday that the United States is pulling out of the Open Skies Treaty, negotiated three decades ago to allow nations to fly over each other’s territory with elaborate sensor equipment to assure they are not preparing for military action. Mr. Trump’s decision will be viewed as more evidence that he also may be poised to exit the one major arms treaty remaining with Russia: New START, which limits the United States and Russia to 1,550 deployed nuclear missiles each. It ... (full story)