Video replay: Parker Solar Probe launches atop Delta 4-Heavy

It was 1986 and the U.S. Air Force was on the cusp of something unprecedented in human spaceflight — launching a space shuttle crew from California and paving the way for people to fly true polar missions.

Crews working on Virginia’s Eastern Shore this week raised a top secret payload for the National Reconnaissance Office — the U.S. government’s spy satellite agency — atop a solid-fueled Minotaur 4 rocket for liftoff July 15 on the first Minotaur launch in nearly three years.

Without any public warning, a Chinese Long March 4B rocket lifted off Sunday with two “environmental monitoring satellites” that the country’s state media said will replace a pair of spacecraft launched in 2008 that collected data to assist in a series of disaster relief efforts over the last decade.