"Due to launch vehicle processing delays in preparation for spacecraft mate operations, NASA and United Launch Alliance have moved the first launch attempt of the Mars 2020 mission to no earlier than July 30", reads the message. "A liquid oxygen sensor line presented off-nominal data during the Wet Dress Rehearsal, and additional time is needed for the team to inspect and evaluate. Flight analysis teams have expanded the mission launch opportunities to August 15 and are examining if the launch period may be extended further into August".
Currently, the crew works prepare to bring the Perseverance vehicle to the launch pad.
On May 30, Elon Musk's SpaceX company launched a Crew Dragon ship with two U.S. astronauts aboard.
Earlier, Musk claimed that Tesla company is approaching the next-level driving technologies, alowing vehicles to move without human interference whatsoever, i.e. without the driver. There's a chance that some of the respective upgrades may be used already by the end of the year.