NROL-70 – Spaceflight Now

April 24, 2025

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ULA concludes six decades of Delta rocket flights with final Delta 4 Heavy mission

April 9, 2024 Will Robinson-Smith

The issue with a gaseous nitrogen pipeline that caused the late March launch scrub was able to be resolved, according to NASA and its contractor, Air Liquide. Liftoff from Space Launch Complex 37 occurred at 12:53 p.m. EDT (1653 UTC).

High winds, gaseous nitrogen pump failure force scrub of the final launch of Delta 4 Heavy minutes before liftoff

March 28, 2024 Will Robinson-Smith

The 16th and last launch of the Delta 4 Heavy configuration also marks the end of Delta line of launch vehicles. NROL-70 with be the 389th Delta launch since 1960 and 45th Delta 4 rocket.