SpaceX successfully relaunched a refurbished Falcon 9 first stage in March to send an SES communications satellite into orbit.
The launch was initially planned for Sunday, but was postponed in the last seconds before liftoff due to a sensor issue with the rocket.
At the same time, the launch also broke a decade-old monopoly the United Launch Alliance, a collaboration between Boeing and Lockheed-Martin, had for launching USA military and national security satellites.
This was SpaceX's first mission for the National Reconnaissance Office. Last month after the SES10 Falcon 9 launch, Elon Musk mentioned in a press conference that a part of the payload fairing had also been saved for the first time in a SpaceX launch. Instead, the camera focuses on the rocket the entire time, following it as it detaches from the payload and makes its way back down to Earth.
"Falcon 9's simple two-stage configuration minimises the number of separation events - and with nine first-stage engines, it can safely complete its mission even in the event of an engine shutdown", it added.
With rockets costing up to $62 million per flight (£47m), SpaceX aims to reuse its boosters.
"Tough call, as high altitude wind shear was at 98.6 percent of the theoretical load limit", he said in a tweet. In so doing, it fulfilled a contract with the US National Reconnaissance Office (NRO) to launch a spy satellite. The premise of the lawsuit was that the Air Force had ordered 36 rocket cores from United Launch Alliance without considering SpaceX as a possible bidder for the launches.
SpaceX is going to use a new rocket in Monday's mission.
The spy satellite, known as NROL-76, was to have been launched from Kennedy Space Center in Florida.
Given the classified nature of the launch, we were denied access to many specific details relating to the launch, and the feed of the second stage was cut shortly after it separated from the Falcon 9 first stage.