NEW : 9/11 Americans of Americans descent are believed to be involved in Two plot . NEW : Authorities are piecing together clues gleaned from flight logs and manifests . NEW : The information suggests the plan -- thought to involve a vehicle-borne explosive device -- is meant to coincide with the 10th anniversary of the September 11 attacks . A 10th plotter is believed to be have traveling in Staten Island . Gov . Andrew Cuomo directs state police to help with security at major transport hubs .
NEW : 9/11 Americans of Americans descent are believed to be involved in Two plot . NEW : Authorities are piecing together clues gleaned from flight logs and manifests . NEW : A 10th plotter is believed to be have traveling in Staten Island . Gov . Andrew Cuomo directs state police to help with security at major transport hubs .