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Jo joining us now, miles o'brien, the science correspondent for pbs news hour. walk us through these. this is the ethiopian airlines flight and the lion air crash five months ago. what do you see here that's similar? >> first of all, top line, this is a graph which depicts terror. this was a wild ride on both aircraft, total roller coaster. just so you know, we're talking about here this is the vertical rate of speed. so how fast it's going up or down, not across the ground. look at this first peak here. shortly after takeoff going up to about 3,000 feet per minute, which is about normal for a...

On this day in 1858 american and british teams laid the first tell graph line across the bottom of the atlantic ocean. at the time the tell graph had been around for about two decades. and over the years its i object venters samuel morris perfected the device's universal language. morris code. soon more than 20,000 miles of tell graph cable stretched all over the united states. eventually an american merchant had an idea connect the states to ireland through an underwater line. crews from several ships failed four times but then successfully laid the 2,000-foot long cable along the atlantic fl...

Are astronomical. put up a chart so everyone can seat dollar numbers under president obama from 2008 onward. it's just a straight graph up. and the numbers are staggering. when you have, leslie, a third the population, a little bit over 300 million people in this country, a third the population receiving some kind of government assistance, do you think that's a god thing? do you think that makes a -- good thing? do you think that makes a strong country? >> absolutely not. i agree with christian. this is not the fault of the president. this is not something that's happened overnight or past thr...

Are astronomical. put up a chart so everyone can seat dollar numbers under president obama from 2008 onward. it's just a straight graph up. and the numbers are staggering. when you have, leslie, a third the population, a little bit over 300 million people in this country, a third the population receiving some kind of government assistance, do you think that's a god thing? do you think that makes a -- good thing? do you think that makes a strong country? >> absolutely not. i agree with christian. this is not the fault of the president. this is not something that's happened overnight or past thr...