HS Today 
November 14, 2011
State and local authorities should be wary of potential terrorist plots against mass transit and buses in particular, according to a bulletin issued on Thursday, Nov. 10 by the Transportation Security Administration (TSA).
TSA Administrator John Pistole announced the bulletin the same day it was issued in a forum at George Washington University in Washington, DC.
Pistole announced that TSA released the bulletin to remind agencies of the general threat against mass transit, not due to a specific new threat. Buses remain an attractive terrorist target due to their open architecture and accessibility for use by millions of travelers.
Pistole described the bulletin, Terrorist Concerns Regarding Mass Transit Bus Systems, as something TSA reissued out of recognition that millions more people travel by mass transit rather than by air, particularly during the busy holiday seasons marked by Thanksgiving and Christmas.
The bulletin noted that attacks against buses are more prevalent worldwide than attacks against aviation systems. Terrorists have launched more than 725 attacks against buses between 2004 and 2009, the bulletin estimated.