SINGAPORE—China is increasingly signaling progress in developing its next-generation carrier-based air wing, with preparations underway for a likely debut at its Sept. 3 “Victory Day” military parade.

The Smithsonian National Air and Space Museum announced the opening of five new galleries on July 28 in Washington D.C.

We are thrilled to open this next phase of exhibitions to the public,” said Chris Browne, John and Adrienne Mars Director of the National Air and Space Museum. “Reopening our main hall with so many ...