MLP-2 Demolition Creates Opportunities for Artemis Missions

Moblie launcher platform 2
At NASA’s Kennedy Space Center in Florida, a truck sprays water along the crawlerway to reduce dust ahead of the crawler-transporter moving the mobile launcher platform 2 (MLP-2) from Launch Pad 39A to a nearby park site in Launch Complex 39. MLP-2 was demolished, making way for newer, more advanced technology to be used in NASA’s Artemis missions. Photo credit: NASA/Kim Shiflett

By Jim Cawley
NASA’s Kennedy Space Center

The mobile launcher platform 2, or MLP-2, served NASA well, as it was used for more than 50 Apollo and space shuttle missions at the agency’s Kennedy Space Center from 1968 to 2011.

A nine-month demolition project for the 25-foot high, 160-foot long, and 135-foot-wide platform, which weighed 9.1 million pounds, was completed last month. Though MLP-2 was a historic piece of equipment, its removal makes way for newer, more advanced technology at the Florida spaceport.

Mobile launcher platform 2 demolition project
The two mobile launcher platforms are seen at the park site at Kennedy Space Center on Jan. 4, 2021. A nine-month demolition project for Mobile launcher platform 2, which used during the shuttle program, was recently completed. NASA/Kim Shiflett

“It was bittersweet having to dismantle MLP-2,” said John Giles, Exploration Ground Systems crawler transporter operations manager. “However, it allows us to make room for newer, more advanced assets to support Artemis missions that will return humans to the Moon and beyond.”

Mobile launcher platforms were used for shuttle missions lifting off from Launch Complex 39A and 39B. These structures did not require a tower since the launch pad had a tower and rotating service structure to allow access to the vehicle.

Since the retirement of the shuttle program, the historic Launch Complex 39A, once the site of Apollo and Saturn V missions, was leased to SpaceX and upgraded to support commercial launches carrying cargo and astronauts into space.

Launch Complex 39B also has changed with the times. It began as an Apollo era structure, was converted for shuttle launches, and now is a clean pad ready to support the Space Launch System (SLS) rocket, carrying the Orion spacecraft as the agency returns to the Moon. When SLS lifts off from pad 39B carrying Orion for the Artemis I mission, it will use the new, advanced mobile launcher that comes with a built-in tower.

Click here to watch a time-lapse video of the MLP-2 demolition.

Team Practices Booster Stacking for Artemis Missions

In High Bay 4 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a crane moves Space Launch System (SLS) solid rocket booster pathfinder segments to stack them atop other pathfinder segments during a training exercise on Jan. 8, 2020.
In High Bay 4 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a crane moves Space Launch System (SLS) solid rocket booster pathfinder segments to stack them atop other pathfinder segments during a training exercise on Jan. 8, 2020. Photo credit: NASA/Glenn Benson

NASA’s Exploration Ground Systems team, including engineers, technicians and crane operators with contractor Jacobs, are practicing lifting and stacking operations with pathfinder segments of Northrup Grumman’s solid rocket boosters, which will provide extra thrust for NASA’s Space Launch System rocket. Practice took place in High Bay 4 of the Vehicle Assembly Building at the agency’s Kennedy Space Center in Florida.

”The pathfinder training has gone extremely well,” according to Michael McClure, Jacobs’ lead engineer for the Handling, Mechanical and Structures Engineering Group. “This is part of a series of practice exercises, which are providing great experience, especially for our new technicians, engineers, quality control personnel and crane operators.”

Stacking rehearsals help prepare the team for actual processing of launch hardware for Artemis missions. These specific pathfinder segments are inert, full-scale replicas of the actual solid rocket boosters, with the same weight (300,000 pounds) and center of gravity.

During launch hardware processing, the booster segments will be shipped by train to Kennedy from the Northrup Grumman facility in Utah. They will arrive at a processing facility to be configured for final processing, then move to the VAB, where the launch processing team will stack them vertically on the mobile launcher. After the boosters are stacked, the SLS Core Stage will be lowered onto the mobile launcher and will be mated to the boosters.

At launch, the five-segment, 17-story-tall twin boosters will provide 3.6 million pounds of thrust each at liftoff to help launch the SLS carrying Orion on Artemis I, its first uncrewed mission beyond the Moon.

Watch a time lapse video of booster segment training at






Kennedy Buzzing with Activity During Apollo 11 50th Anniversary Week

Apollo 11 liftoff
Kennedy Space Center will host multiple programs as part of the 50th anniversary celebration of the Apollo 11 mission. Photo credit: NASA

The Apollo 11 mission, which landed the first two humans on the Moon, remains one of mankind’s most impressive achievements. To honor that historic event on its 50th anniversary, several activities are taking place at Kennedy Space Center in Florida, including multiple shows on NASA TV and the agency’s website:

Apollo 11 patchTuesday, July 16:
Astronaut Michael Collins, who served on that historic mission in July 1969, will start the day with a visit to the Astronaut Crew Quarters in Kennedy’s Neil Armstrong Operations & Checkout Building before participating in the day’s televised events.

From 9:15 to 10 a.m. EDT, Collins will speak with Kennedy Director Bob Cabana at Pad 39A, the site of the July 16, 1969, launch. Cabana was the commander of STS-88, the first International Space Station assembly mission, which celebrated its 20th anniversary on Dec. 10, 2018.

Friday, July 19:
Tune in to a pair of special live broadcasts from Kennedy’s Apollo/Saturn V Center. The first, an Apollo 11 show titled “NASA’s Giant Leaps: Past and Future,” is from 1 to 3 p.m. EDT. It will honor the heroes of Apollo, and examine NASA’s future plans, including the Artemis missions that are part of the agency’s Moon and Mars human space exploration. That will be followed by a program titled “STEM Forward to the Moon” from 3 to 3:30 p.m. EDT, featuring kids across the nation participating in Moon landing simulations and other activities.

Remember to tune in to NASA TV and the agency’s website for the special Apollo 11 coverage.