Homeland Security Investigative Task Force

You are the head of a Homeland Security Investigative Task Force assigned to mitigate threats or possible terrorist attacks against the port area of San Diego. This includes numerous U.S. Navy vessels as well as a number of oceanic freighters, local fishing vessels, and pleasure yachts. You have received a threat from an unknown source stating that coordinated attacks are going to be launched against military and civilian targets in and around the San Diego area. The threat alludes to the use of nuclear missiles launched from vessels off the coast of San Diego. The source of the threats remains unknown, but intelligence points toward North Korea and Iran. 
Your job is to identify the probable source of the threats as well as mitigate the numerous scenarios of attack that could stem from the Pacific Ocean, the Baja, the roadways entering San Diego from all directions, or from within San Diego. No specific terrorist group has given any notice of an attack. 
You must identify all probable sources from which a nuclear missile could be launched. Since intelligence advises that neither North Korea nor Iran have long range capability, your search must be restricted to the immediate area. Additionally, all you know is that the attack is scheduled to occur sometime this month. 
Identify all possible sources that could launch a nuclear missile and determine countermeasures that will empower your personnel to defeat the attack or attacks before they occur. 
Your plan must include a worst-case scenario response plan to enable you to properly respond and deal with the blast effects from the attack should your personnel fail to stop the attack or attacks.