Senior military and counterterrorism officials say the increased Predator strikes have disrupted planning, pushed some insurgents deeper into Pakistan, prompted some militant commanders to post additional sentries and forced the militants to use their cellphones and satellite phones, which American eavesdropping operations can monitor.
This impasse reflects China's equivocal relationship with its troublesome neighbour and North Korea's unequivocal commitment to nuclear weapons.By tradition, China has viewed North Korea as an ideological soulmate that can "stand sentry" against American forces stationed in South Korea, points out Ren Xiao of Fudan University.
The stark, white, 108-foot-high figure was erected last month in part to serve as sentry against a force already churning through Poland.
During the Cuban missile crisis, an air force sentry in Minnesota shot at a fence-climbing intruder and sounded the sabotage alarm.
Counter-intelligence efforts have also increased, and orders given for extra "guardian angel" sentries to watch over coalition forces when working with Afghans.
One possible program that could perform this sort of hack is Sentry MBA which brute forces websites to log into accounts at a set interval.
Though at first the second Sardinian attack was unnoticed by the Tripolitanians, a sentry sighted the approaching force at 2 30 AM.
In the defence sector, South Korean forces have deployed Samsung SGR-1 armed sentry robots to patrol the border with North Korea and in Iraq and Afghanistan the iRobot Packbot Tactical Mobile Robot removes unexploded bombs and mines and collects forensic evidence.
After riding 80 miles in 24 hours, the only fire encountered was from the American sentries as May's force re-entered friendly lines.
After Fort Henry fell to Union forces on February 6 , 1862 Fort Donelson stood as a lone sentry protecting important Southern agricultural lands and the city of Nashville, the capital of Tennessee and a munitions centre.
In the early dawn, the small force marched on the fort, surprising the lone sentry.
