Could terrorists start a global nuclear war with just one nuke if they had one?

[buddhallah_the_christ]

It is widely supposed that terrorists are racing to get a nuclear weapon.
Suppose terrorists secretly planted a 13 kiloton nuclear bomb in New York and detonated it, could that trigger a global nuclear war?
Which country will start an active involvement into the conflict?
Where will be these terrorists from? USA?

 

[pismoe]

assuming terrorists , well we know that they'd probably be the same old terrorists that they have been these last 20 years or so . Nuke war , I don't know , if a nuke went off in the USA the USA would 'probably' know if a country or a terrorist group did it . No matter what though , pretty interesting but unlikely scenario in my opinion Buddah .