They operate in the green glow of night vision in Southwest Asia and stalk through the jungles of South America.  They snatch men from their homes in the Maghreb and shoot it out with heavily armed militants in the Horn of Africa.  They feel the salty spray while skimming over the tops of waves from the turquoise Caribbean to the deep blue Pacific.  They conduct missions in the oppressive heat of Middle Eastern deserts and the deep freeze of Scandinavia.  All over the planet, the Obama administration is waging a secret war whose full extent has never been fully revealed — until now.