Japan cancels the launch of a new rocket carrying a missile sensor.

As the supplemental booster engines failed to ignite, Japan's space agency canceled the launch of its next-generation H3 rocket on Friday, according to officials. The main engine of the rocket, which is carrying an observation satellite and an experimental sensor to detect missile launches, had already started to fire when the launch was aborted, according to the Japan Aerospace Exploration Agency. "I'm aware that a lot of people ....