The NASA TRACERS mission is set to launch on Wednesday atop a SpaceX Falcon 9 rocket after SpaceX postponed Tuesday's launch due to "airspace concerns."

One of these ride-along NASA efforts is the Athena EPIC (Economical Payload Integration Cost) SmallSat, which will demonstrate a new way of more efficiently placing remote-sensing (or rather, Earth-observing) instruments into orbit.

Live updates from the July 22 SpaceX SES O3b mPOWER satellite mission that launched a Falcon 9 rocket from Cape Canaveral Space Force Station in Florida.

SpaceX has lined up an evening launch from Cape Canaveral on Monday, but the threat of thunderstorms could force a delay.

Live updates from the July 21 late-countdown scrub of a SpaceX SES O3b mPOWER launch attempt from Cape Canaveral Space Force Station in Florida.

An international crew is readying for Thursday's planned launch of a NASA mission to the International Space Station after arriving at the Kennedy Space Center.

NASA has elected to find new sealant material to address helium leaks and explore several hardware changes to deal with what was determined to be overheated thrusters.

Ax-4 is commanded by Axiom's director of human spaceflight and former NASA astronaut Peggy Whitson. Joining her are Shubhanshu Shukla of India, Sławosz Uznański-Wiśniewski from Poland, and Tibor Kapu, from Hungary. The three will be the first astronauts from each of their nations to launch on a mission to the ISS.

The Federal Aviation Administration said a regional power outage disrupted telecommunications at the Los Angeles Air Route Traffic Control Center, which forced postponing of the SpaceX Falcon 9 TRACERS launch on Tuesday.