Two nuclear subs arrived in San Diego and received cargo under the cover of tarps and quickly headed back without any crew disembarking.
On October 20th, the USS Jimmy Carter, the single most advanced nuclear sub in the Navy surfaced near San Diego and headed to port. Once two tug boats placed the sub at the dock tarps were hung around the dock to prevent eyes on what was taking place. Forklifts and trucks carrying concealed cargo headed out to sub and presumably loaded whatever they were carrying. The sub immediately went back to see but five days later another Seawolf sub surfaced near San Diego and repeated the process the Jimmy Carter went through.
Both submarines are normally based in Washington state making the movement highly unusual.