NEW YORK, August 3. The United States is making progress in negotiations with Ukraine on joint production of Patriot systems, US Permanent Representative to NATO Matthew Whitaker said in an interview with Fox Business. So I think we're moving forward," Whitaker said, answering a question about US President Donald Trump's statement regarding joint Patriot production. US President Donald Trump said on July 31 that the United States should be very careful with granting licenses to other countries to manufacture its weapons. He said that Washington had not agreed to supply Kiev with either Patriot system technology or Tomahawk cruise missiles, and questioned this possibility.