Software problems are plaguing the Homeland Security Department's virtual fence project, according to officials. The system is supposed to coordinate camera, sensor and radar sightings and give agents on the ground a broad picture of activity so that they can intercept people attempting to enter the U.S. illegally. "The integration of all the systems into a common operating picture continues to be the challenge," said DHS spokesman Russ Knocke. Boeing has put new people on the project who are working to resolve the problems, he said.

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