in response to june s deadly metro rail crash. while the exact cause is still under investigation, the ntsb identified signal failure as a major concern. until the ntsb issued safety recommendations, others to federal rail agencies. the agency wants metro to examine the circuits. metro is also to develop a program to monitor electronic components to make sure they are performing properly. and all rail agencies in the country that use similar systems must now examine their tracks to make sure circuits are working properly. so what does metro have to say about all this? we ll hear from general manager, john kato on 9news now at 7:00. now to our other top story, mass transit, trains and buses, all under terror alert. the new bulletin stretched to hotels and other entertainment facilities. we have live team coverage from bruce leshan and scott broom. we begin with scott live from the national harbor. scott. well, here at the foot of wilson bridge, national harbor is a big enter