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seemed 'carefree'  Lt. Thom Bjerke of the Pershing County,
Nevada, Sheriff's Department   RENO, Nevada (CNN) -- Accused
pipe bomber Lucas Helder has admitted planting 18 devices in a
weekend five-state spree, a federal prosecutor said Wednesday.
Helder is being held without bail in Reno, Nevada, where he is
awaiting transfer to Cedar Rapids, Iowa.  Helder was captured
Tuesday in Nevada after leading FBI agents and the state police
on a high-speed car chase. He is facing federal charges in four
states.  CNN's Paula Zahn talked with Lt. Thom Bjerke of the
Pershing County, Nevada, Sheriff's Department. Bjerke was part
of the team that took Helder into custody.  CNN: How did you
pull this off?   CNN NewsPass Video    •  Pipe bomb suspect's
father speaks out   •  Helder admits to pipe bomb spree   • 
Suspected mailbox bomber in custody   •  Father tipped cops to
Helder's identity   •  Access: Officer: Bomb suspect seemed
'carefree'   •  Pipe bomb char