The US has signed a more than US$3 billion deal with Lockheed Martin and Northrop Grumman to ramp up production of Patriot and ‌THAAD interceptor missile parts, as conflicts in Iran and Ukraine strain stockpiles.The deal, announced by the Pentagon and Northrop on Monday, follows last week’s announcement of a contract for Lockheed worth up to US$58.6 billion to produce Patriot interceptor missiles.The United States has supplied large amounts of arms to ⁠allies while also using munitions in the Iran conflict, raising concerns about inventories of air ‌defence and precision-guided weapons.The Pentagon said in its statement on Monday that the...