A United Nations investigator called on the world body Friday to set up a panel to study the ethics and legality of unmanned military weapons - an apparent reference to U.S. drones that have targeted suspected Islamist militants.  ....

Alston said that killings ordered far from the battlefield could lead to a "PlayStation" mentality. The CIA contested his findings, saying - without confirming it carried out the strikes - that its operations "unfold within a framework of law and close government oversight."