events altered america forever. good morning, everyone, welcome to msnbc saturday, i'm alex whit. it's just past 11:00 on the east, 8:00 a.m. out west. let's get to what's happening out there. new details on three unidentified men believed to be part of a possible al qaeda plot timed with the anniversary of 9/11. security extra high in washington wug and here in new york city. on word that these men may try to launch an attack tomorrow, using car and truck bombs. earlier today i spoke with congressman peter king, the chairman of the homeland security committee who told me about the intelligence behind the potential plot. >> the most important thing is getting such a specific plot plan. i've been doing this for a number of years. i've never seen a plot that was laid out so specifically. usually you get bits and pieces and have to worry about connecting the dots. that's not the case here. >> i'm joined by wnbc tv