American defence chiefs, for their part, worry that a rival system could be used by an enemy to direct missiles at the United States.
Each beacon might be deserted, or contain friendlies offering support, or an enemy ship to be fought or escaped with another faster than light jump.
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Where a court finds that a detainee cannot be held as an enemy combatant, he should be returned to his home country or another country willing to receive him.
Mr Blair is splendid when he is faced with an enemy to be defeated.
It just doesn't pay to be an enemy of the open source movement these days.
He knows that the overwhelming majority of Americans consider Iran to be an enemy of their country.
Several GOP lawmakers on Thursday said Abu Ghaith should be considered an enemy combatant and sent to Guantanamo.
To hold the suspect as an enemy combatant under these circumstances would be contrary to our laws and may even jeopardize our efforts to prosecute him for his crimes.
It is part of what the U.S. military calls Combatant Status Review Boards, a process to determine whether a detainee is an enemy combatant and should continue to be held or if he should be released.
They urged that Tsarnaev be held as an enemy combatant, a designation that allows a suspect to be questioned without a lawyer and without being Mirandized.
Republicans have criticized security officials for charging the suspect in criminal court instead of treating him as an enemy combatant to be prosecuted by a military commission.
In a crisis, the temptation would always be to hold these missiles on a hair trigger, to be launched on warning of an incoming attack rather than lost to an enemy strike.
To be demonised, an enemy must not just present a clear and present threat, but a convincing image of one as well.
Meanwhile, the Lebanese government has told the United Nations that showing any of the tape would be "unacceptable" and tantamount to providing an enemy with intelligence.
His priority must be to heal the rifts within the Republican party and to turn John McCain into an ally, not an enemy.
He stressed that the world can be an enemy of Christian hope, but that people should try to focus on heavenly thoughts.
To the congregation, and the crowd outside, this is an extraordinary gesture by a man assumed to be a natural enemy.
But the idea of an "enemy of the public" can be traced all the way back to the year 68AD, when the Roman Senate declared Emperor Nero a "hostis publicus".
"It's an important wake-up call as to how lethal the enemy can be, " said Rep. Peter King, a New York Republican who sits on the House International Relations Committee.
Yet it would be quite wrong to see Mr Wahid either as a supporter of the old regime or as an enemy of democracy.
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"We wanted to win by more than six, but knew that the scoreboard would be an enemy if we started concentrating on it during the game, " he told BBC Sport.
Zynga announced that it would soon be launching its own platform, and while it faces an uphill battle, it could soon become a formidable enemy to Facebook if it starts to siphon off games traffic.
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Based on brief segments of footage shown off, it seems like this ability should be used fairly often, as a well-timed block will mitigate damage and stagger an enemy, giving you an opportunity to land a few extra hits without fear of retaliation.
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