The Department of Defense is slamming the door on questions about the mysterious contrail filmed Nov. 8 by a KCBS television crew near Los Angeles after questions were raised about a warning from the National Geo-Spatial Intelligence Agency that there could be missiles fired in that area at that time. The official government position has been that the contrail, which appears to have been made by a single source, was from a jet passing by. And the refusal to provide answers to specific questions suggests a cover-up of potential secret missile testing in the area – contrary to official jet...