and "RECYCLE", since the mission was originally scheduled on Earth Day. SpaceX Crew-3 – all three vehicles had the NASA worm logo on the doors painted in grey. The meatball logo was on the rear windshield. The license plates on all of them read "S3ND IT" for "SEND IT". Design A series production vehicle was unveiled on September 29, 2015. It has a panoramic windshield. According to Tesla CEO Elon Musk, it is the safest SUV in terms of frontal and side impact crash, being more than twice as safe as the next closest SUV in rollover tests as well. The Model X does come with Autopilot as standard, and has an optional full self-driving system. The Model X has standard a collision avoidance system that uses radar-based autonomous emergency braking (AEB) and side-directed ultrasound detection that steers the car away from threats. Tesla uses a wide-band radar system to help prevent the falcon wing doors from hitting nearby objects when opening or closing. The Model X has double-hinged falcon wing doors which open upwards, allowing the leading edge of the door to remain tucked close to the body, unlike traditional gull-wing doors. Tesla claims the falcon-wing (modified gull-wing) doors ease access to the vehicle by having the door raise up vertically, rather than swinging out hinged at the front, which tremendously reduces accessibility. The Model X offers room for seven adults and their luggage in three rows of seating and front and rear trunks. As of mid 2021 it's the largest fully electric SUV in terms of exterior dimensions. Specifications The Model X weighs about 8% more than the Model S and shares about 30% of its parts content – down from around 60% expected when development began. The cargo space is 87.8 ft³. Over the years, the Model X has been available with four lithium-ion battery packs, rated at either 60, 75, 90, or 100 kW·h. The highest performance version, the Model X Performance, goes from 0 to 60 mph (0 to 97 km/h) in 2.6 seconds and the in 11.4 seconds, outperforming the fastest SUVs and most sports cars. The Model X's all-wheel-drive system uses two motors (one for the front and the other for the rear wheels), unlike conventional AWD systems that have a single source of power. The 2020 Tesla Model X Long Range Plus has an official EPA rated range of up to .