An important part of data collection for the United States space program, the North American X-15 had astonishing performance ...

The X-1’s fuselage was designed to resemble a .50 caliber bullet—one of the only shapes known to have stable flight at ...

The Alaskan Command said its top priority was homeland defense to safeguard the U.S. northern approaches.

Japan said it and the U.S. would not tolerate unilateral changes to the regional status quo by force.

Chinese and Russian warplanes flew around Japan’s southern islands, following a course taken days earlier by China’s first ...

Four years after a landing-gear failure severely damaged a B-2 Spirit bomber at Whiteman ...

Elon Musk’s X has begun rolling out a new feature for user profiles that will display information about the account, including where it’s based, how many times the account has changed its username, ...

The North American X-15 did more than set records; it quietly redrew the map of what a piloted aircraft could survive at the ...

The United States’ reusable X-37B spaceplane has long been shrouded in secrecy, but Chinese military analysts have now ...

You'll soon be able to see more information about X accounts, including where they're based and how many times they've changed their usernames. X is rolling out a new feature called "About this ...

At the end of October 2025, when the government shutdown was beginning to get serious, American space agency NASA conducted the first flight of the X-59 experimental supersonic aircraft. It was a ...

A new feature on X has stirred confusion, anger and a wave of online sleuthing after users discovered that the platform was suddenly displaying the surprising locations where certain accounts are ...