jet

The compounds shed both water and grease and are used in coatings in nonstick cookware, stain-resistant fabrics, and jet engines.

Even as Trump was unveiling his new cabinet, Chinese state media published videos from the country’s biggest airshow of a new stealth fighter jet – the J35-A – flying vertically and upside-down.

Airlines began trans-Atlantic jet passenger service in 1958, significantly cutting travel time and inaugurating a period of exponential growth in travel to Europe.

Some, including providing modern battle tanks and fighter jets to Ukraine, have since been crossed without triggering a direct war between Russia and Nato.

Poland, Ukraine's neighbour to the west, scrambled fighter jets to patrol its own airspace as a security precaution, Poland's Operational Command said.