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now they re assessing exactly what happened here. we re told that something fell off a metro train down on the tracks. the most likely culprit is what they call a friction ring. that s a part of the brake assembly. we re told that s a redundant part so the train was able to brake even though that ring apparently fell off that breaking mechanism. at no point was anyone in danger according to metro officials. when that ring fell off, it apparently made contact with the third rail. that s the energized rail. that created some smoking conditions down in the tunnel. they stopped the train. they were able to offload everybody safety with the assistance of metro officials. they got everyone off of the train. and now they re trying to assess exactly what happened and what they need to do in order to get the tracks reopened. right now the orange and blue line traffic has been suspended between federal triangle and federal center until they can get a better handle on what happened here