>> reporter: but members of congress are demanding more answers about whether there's been a pattern of rogue behavior. pierre thomas, abc news, washington. >> it's hard to believe that this is really a first-time thing. an aberration. and senator lieberman's own comments, again, hard to believe that in one night, 11 secret service agents in colombia, there to protect the president, suddenly and spontaneously did something that other agents haven't done before. >> yeah, and something else also cited in the hearing which is also very interesting but i don't think it's really a surprise. 60% of secret service agents said they would not report misconduct of their colleagues. so you have to believe -- >> not surprising. >> not surprising. you have to at least surmise that there might be something else going on that hopefully we'll find out about. >> yep, i think there's more to the story. and i'm sure it's going to keep coming out. >> i think you're right. >> all right. and on to a developing story from new england. a fire has broken out aboard a u.s. navy -- a u.s. navy nuclear sub docked at a shipyard in maine. the "uss miami" arrived for