The US is developing a complex, four-layered missile defense system called the Next-Gen Interceptor (NGI), incorporating space-based sensors and three ground-based weapon layers.
The US has confirmed an Iranian missile hit the Al Udeid air base in Qatar last month, after satellite imagery appeared to show a destroyed radar dome.
The US has paused the transfer of some key military equipment to Ukraine, apparently including Patriot missiles and F-16 weaponry, due to dwindling stockpiles.