The launch of a United Launch Alliance Atlas V 551 rocket carrying the Space Test Program-3 (STP-3) mission for the U.S. Space Force’s Space Systems Command (SSC) has been scrubbed.

During initial operations, a leak was discovered in the Rocket Propellant-1 (RP-1) ground storage system.

Launch is now scheduled for Mon., Dec. 6 at 4:04 a.m. EST.

ULA, photo Scott Schilke,