The movie "The Sum of All Fears" had a nuke transported to Baltimore Port via a cargo vessel.
After the Neo-Nazi's scientists build asecret nuclear weapon that is detonated in Baltimore,and a rogue Russian officer paid off by the Neo-Nazi attacks a U.S. aircraft carrier, the world's superpowers are pushed close to the brink of war.
https://en.wikipedia.org/wiki/The_Sum_of_All_Fears_(film)