Forbes.com columnist Gordon Chang told CNN's "Erin Burnett: OutFront" that the boat's cargo was a warning sign that North Korea could be supplying Cuba with weapons.
"This is a country which is just 90 miles away from American shores," he said. "Now, if they can smuggle missile radar into Cuba, you know, God knows what else they can put there. We do not need a replay of the Cuban missile crisis, this time with the North Koreans' fingers on the triggers instead of the Soviets."
The U.S. government's assessment is that Cuba might be trying to further its arms relationship with North Korea in the wake of Russia's not being interested in doing the upgrade work on the aging stockpile, a U.S. official said.