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A United Launch Alliance Delta 4 Heavy rocket launched NROL-91 for the National Reconnaissance Office Sept. 24, 2022, from Vandenberg Space Force Base, California. Credit: ULA

Each of the Delta 4 Heavy’s common booster cores is powered by Aerojet Rocketdyone’s RS-68A main engines. The Delta cryogenic second stage is powered by an RL10C-2-1 engine. The rocket uses liquid hydrogen and liquid oxygen in all stages.

New Health & Safety Reps. at AeroJet Rocketdyne

UNIT 8, 10, 17 Membership Meeting

The History Of Labor Day

The First Labor Day Having the first Monday in September off from work was significant for American workers in 1894, when Labor Day was declared a national holiday. Working conditions in the country’s factories, railroads, mills, and mines were grim. Employees, including many children, were often required to work 12 hours a day, six days a week, in crowded, poorly ventilated spaces. Supervision was harsh and punishments were handed out to those who talked or sang as they worked.

Covid-19 Testing Remains Key to Slowing the Spread; Free At-Home Tests Readily Available Across the County

LU 2850 Strike Letter