UPDATE July 23: Rocket Lab announced it will launch four satellites -- one for commercial Earth observation startup BlackSky, one for startup SigInt provider Unseenlabs of France and two technology demonstration satellites for the U.S. Air Force Space Command -- in August for the Electron rocket's next flight.

Despite a 2-month-plus delay in the launch of Kleos Space's first four SigInt satellites from August to no earlier than October, Rocket Lab said it its manifest includes "monthly missions scheduled for the remainder of the year . . .

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