Rescued ... Helen Johnston.  Rescued ... Helen Johnston. Photo:
Reuters  The dramatic details of how the SAS completed a
"brilliant" rescue of a British aid worker and three other
female hostages in Afghanistan can be revealed.  Defence sources
said the "surgical" operation showed the "precision, skill and
courage" of British special forces after they stormed the cave
where Helen Johnston, 28, was held, and killed her kidnappers.
David Cameron spoke individually to the soldiers to thank them
for an "extraordinarily brave" mission. He warned that anyone
who took British citizens hostage faced "a swift and brutal
end".  Regret ... British PM David Cameron.  Strong words ...
British Prime Minister David Cameron.     On Saturday night,
sources said it had been a "classic operation" that was
"brilliantly executed" after days of painstaking intelligence
gathering. The hostages' exact location was pinpointed early
last week using mobile phone interception technology. Predator
drones flying silently at 20,000ft kep