Overnight Defense: Trump to withdraw US from Open Skies Treaty | Pentagon drops ban on recruits who had virus | FBI says Corpus Christi shooting terror-related

Happy Thursday and welcome to Overnight Defense. I’m Ellen Mitchell, and here’s your nightly guide to the latest developments at the Pentagon, on Capitol Hill and beyond. CLICK HERE to subscribe to the newsletter.THE TOPLINE: President Trump on Thursday caused an uproar in Washington with his newly reveled plans to withdraw from another major arms control agreement, the Open Skies Treaty, citing Russia’s violations of the pact.The Open Skies…