How safe/ethical is it to allow unmanned machines to take out tragets

Talon - A automated war machine
@anonvenu (401)
March 13, 2007 12:54am CST
America and many other big military powers are investing big in Automated machines/ Robots that can take out large and small targets in combat and hostage situations. My question is how safe is it to do so? How ethical is it to do so?
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