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carlyle group, david rubenstein. then i have a lot to talk about with an all-star panel. arianna huffington, mort zuckerman on the gop race, the economy, the euro, iran, all kinds of things. next up, what do the shipyard in tahrir square have in common? a lot. i'll explain. first, here's my take. i spent the last few weeks working on an essay for "time magazine" on barack obama's foreign policy, and in association with that piece, i interviewed the president last wednesday in the oval office. let me give you a few of my thoughts and impressions. obama seemed relaxed, calm, confident....

Thank you. jon: all this is bringing stepped up security here in the u.s. am track, the biggest mass transit system, ramping up uniformed officer patrols on its national routes, all part of a major security exercise called operation rail safe. steph centanni, live at union station in washington, d.c. so for amtrak passengers, steve, what can they expect from this security exercise? >> reporter: jon, they will notice some changes. i'm at union station in washington, d.c., one of the biggest hubs in the northeast corridor. this operation is called a rail -- called rail safe and it's an opportuni...