The Sicilian Scenario

The Sicilian Scenario is a strategy to combat an ultimate terrorist concept, which is adapted and used to combat a modern ultimate global terrorist situation, from a new faction of global terrorists, who acquire a considerable mass of plutonium, and are resolute in taking their conflict beyond anything yet achieved.
Terrorists attack a remote military base, on a South Pacific island, and detonate an atomic bomb so powerful that it obliterates part of the island.
It is evident that they are targeting the US and UK, and they obliterate a large section of inner London with a massive plutonium bomb.
They kidnap a leading senator and capture one of the world's most advanced atomic submarines.
Fighter planes patrol San Francisco, and the armed forces track the DX1 across the Pacific. While they stay ready to launch its nuclear missiles, and give unparalleled demands, which even the president does not know if they are capable of providing.