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Now to a cnn exclusive, look inside the uss hartford, nuclear powered submarine challenging russia in the arctic. jim sciuto got exclusive access to see how they deal with potential threats under the ice. >> reporter: more than 100 miles north of the northern-most tip of alaska, we set down on a runway carved into the arctic ice. our objective? u.s. navy submarine exercises called ice-x. cnn was granted exclusive acces access. >> it may not look like it, but it's moving all the time. this is the giant kaleidoscope of giant pieces of ice. >> reporter: a new front in the

hey, kiera. >> good morning, guys. great to see you. here's some of the stories that have us talking this morning. nervous investors awaiting this hour's opening bell on wall street. the doll plunged 266 points yesterday for its eighth consecutive loss. trial under way for former egyptian president hosni mubarak. the ailing hue mark could face execution if convicted in the deaths of anti-government protesters. florida watching tropical storm emily as it approaches the northern caribbean. warnings up in haiti and the dominican republic. -- captions by vitac -- www.vitac.com well...

York. i see you are marching along with the folks there. what's the turn zoout and atmosphere and what is their end game? [ inaudible ] >> unfortunately, we must have lost our connection with sarah. we'll check back with them as the day goes on. coming up, we'll take you inside north korea, will ripley, got exclusive access, the only american reporter to go inside north korea right now. tensions rise. next, i will speak to the former prime minister of austria of his unique perspective on president trump's challenges with china and north korea. you are live in the cnn newsroom. calcu...