557th erhs crushes initial cargo load of rock crusher ,mar 18, 2021 u.s. air force tech. sgt. michael tiller, expeditionary civil engineer squadron security forces advisor, drives a forklift during a cargo load march 11, 2021, at Al udeid air base, qatar. the cargo load was the first of its kind for the specific style of rock crusher equipment and culminated a two-year long project.
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