[DifE-Q]

The previous and current nuclear strategy consists of a concept called TRIAD. Land, Sea and Air nuclear weapons.

http://en.wikipedia.org/wiki/Nuclear_triad

They all have their advantages and disadvantages and strategic uses. Taken together they are a complete package of nuclear strike capabilities. Nothing about it is obsolete as the author suggests.

Battleships also are hardly obsolete and also have advantages and disadvantages. For instance, when the Missouri class battleships were retired in the 90's, it was met with a great deal of opposition by the marines. No other weapon in the military arsenal could provide beach bombardment like the battleship; and certainly not for the low cost. The marines were promised a replacement - they are still waiting.