6a

Chips: High-tech aids or tools for Big Brother? http://www.msnbc.msn.com/id/19904543/

Microchips implanted in Mexican officials http://www.msnbc.msn.com/id/5439055/

VeriChip Secures Financing Commitment http://www.tmcnet.com/usubmit/2009/10/03/4404523.htm

6b
"VeriChip" + "human use" + "FDA"
"microchip" + "mandatory" - "animals"
"trackers" + "beneficial" - "government"
"VeriChip" + "first amendment" + "voluntary"

6c
http://www.protopage.com/becka-ncis06