Trump’s national security adviser, Robert O’Brien, said Sunday that the United States is still “very upset” by the move to purchase the Russian S-400 system.

While the US and China are neck and neck in the race for high-tech supremacy, the Defense Innovation Unit offers solutions on how to not let the Communist country set global standards.

The Pentagon is pushing to double the power output of lasers, to over 300 kilowatts, so they can defeat a threat found in arsenals from the Russian army to the Chinese navy to Iran: cruise missiles.

The U.S. exported weapons worth more than $110 billion over the past two years, a top Pentagon official said Tuesday.

The Trump administration dispatched senior officials to Turkey to press for an end to Ankara’s military offensive in northeastern Syria, as Moscow began to fill a void created by departing U.S. troops.

Saudi state news agency SPA announced the royal approval on Saturday night, reporting that the deployment takes place in line with the “historic relations and well-established partnership” between the two countries.

U.S. President Donald Trump sparked controversy on Saturday when he weighed in on a former U.S. Army commando who will face a military trial in December on allegations that he murdered a bomb-maker years ago in Afghanistan.

The United States is on the verge of leaving a decades-old treaty that has helped it gain intelligence on the militaries of potential foes, especially Russia.

Taking a welcome break from his involvement in the Trump-Ukraine issue, US Secretary of State Mike Pompeo completed his short Balkan swing on 6 October after signing an important agreement in Athens to update US-Greece defence arrangements and expand US military presence in the region.

The U.S. is offering a $5 million reward for information that leads to the arrest or conviction of the militants who committed or aided in the deadly Oct. 4, 2017, attack on a joint U.S.-Nigerien military patrol that left four U.S. soldiers dead.