>> norah: that was cecilia vega reporting, and cbs news reached out to the fbi, which says it will notbout ongoing litigation. both the saudi government and omar al-bayoumi deny any involvement in 9/11, and lawyers for the government have filed a motion to dismiss the case. oral arguments are scheduled for later this summer. "60 minutes" will have more on this story in the fall. turning now to the dangerous weather, nearly 100 million americans from coast to coast are suffering under dangerous heat conditions, while parts of texas are underwater from heavy rains and storm surge, from what was tropical storm alberto. that's the first named storm of the hurricane season, and it is being blamed for at least three deaths in mexico. cbs's dave malkoff reports on the damage. >> reporter: tonight, alberto is no more, but not before devastating parts of mexico and the texas coast. in northern mexico, the city of monterrey, first responders rescued this stranded driver trapped near an underpass. here in the u.s., alberto brought heavy rain and storm surge flooding to parts of texas, including t

here is "60 minutes" correspondent cecilia vega. >> looking... >> reporter: a voice on the video saysarabic "i am transmitting these scenes to you from the heart of the american capital, washington. this video unsealed in federal court this week and obtained by 60 minute was recorded in the summer of 1999. the man behind the comer know my camera is omar al-bayoumi, who the fbi says was an operative of the saudi intelligence service with close ties to two of the 91 hijackers. >> time 6:00 p.m. >> reporter: the video was filmed over several days. al-bayoumi recorded accident no mic entrances and exits of the capital, security posts, a model of the building, and nearby lan. in this portion of the video, al-bayoumi points out the washington monument and says "i will get over there and report to you in detail what is there. he also notes the airport is not far away. >> what i see bayoumi doing is going out and making a detailed video record of the capitol, from all of its sides, and then conducting that 360-degree panoramic view. >> reporter: richard lambert is a retired fbi agent who led

capitol two years before the attacks. "60 minutes" correspondent cecilia vega has this exclusive reporttting these scenes to you from the heart of the american capital, washington." this video unsealed in federal court this week and obtained by "60 minutes" was recorded in the summer of 1999. the man behind the camera is omar alba yumi, who the fbi says was an operative of the saudi intelligence service with close ties to two of the 9/11 hijackers. >> time is 6:00 p.m. >> reporter: the video was filmed over several days. bay yumi records entrances and exits of the capitol, security posts, a model of the building, and nearby landmarks. in this portion of the video, bay yumi points out the washington monument and says "i will get over there and report to you in detail what is there." he also notes the airport is not far away. >> what i say bay yumi doing is going out and making a detailed video record of the capitol from all its sides and then conducting that 360-degree panoramic view. >> reporter: richard lambert is a retired fbi agent who led the initial 9/11 investigation in san diego,

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