Updated: 10:02 AM CST Jan 19, 2021 The Associated Press The U.S. Space & Rocket Center in Huntsville says it will restore the world's only full-sized mockup of the space shuttle along with its external fuel tank and twin rocket boosters.The project announced Tuesday will restore a display that's been weathering outside the state-run museum for more than 30 years. The work is being funded with a $500,000 federal grant along with corporate donations.The shuttle test model called Pathfinder was mated with a huge fuel tank and two prototype solid-rocket boosters and has been displayed outside the museum since 1988. The restoration project will take several years to complete.