seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. gelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products.w that we're your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good eveningthnd k you for joining us. u.s. investigators will head to the scene of a plane crash in t ethiopt killed all 157 teople on board this morning. search and rescus found no survivors at the scene of the crash, 40 miles south of ethiopia's capital of addis ababa. the ethiopian airlines plane was a four-month-old boeing 737 maxs eight, the nmodel of the popular commercial airliner. and the same model as anio indonesianair flight that crashed in october. kenya's transport ministerhe confirmed thatargest numbe

seton melvin. mi the cheryl and philitein family. dr. p. roy vagelos and diana t. vagelo lthe j.p.b. foundation. rosalind p. . ebarbara hope zucke corporate funding is provided by mutual of america-- iddesigning customized indl and group retirement products. that's why we're your retirement company. additional support has been provided by: and by theorporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. america's first national park and one of our most beloicd. set to cla music from the world's best composers, "yellowstone symphony" showcases the park's stunning scenery and wildlife as it changes through the seasons. see yellowstone like never before and marvel tt the natural wonder s special place. ♪ -explore new worlds through programs like this, made available for everyone, through contributions to your pbs station from viewers like you. thank you. ♪

seton melvin. the cherylnd philip milstein family. dr. p. roy vagelos a diana t. vagelos. the j.p.b. foundation. rosalind p. walter barbara hope zuckerberg. corporate funding is provid by mutual of america-- designing customized individual and group retirement products. that's why we're your retiremepany. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening, and thanks for joining us. the united sta cutting off direct aid to el salvador, guatemala, and honduras. the state department announced today that it will suspend 2017 and 2018 payments to the three countries. ve comes one day after president trump threatened to mmut down the u.s.-mexico border overration and said that the cuts were already in place. >> i've enents to guatemala, to honduras and el salvador. ymore.ey goes there an we were giving them $500 million. e giving them tremendous aid. we stopped p

seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundation. salind p. walter. barbara hope zuckerberg. drporate funding is provi by mutual of america-- designing customized individua and group retirement products. that's why we're your .retirement compa additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening,oi and thanks forng us. new zealand is in mourning after the deadliest terror attack in the country's history. at least 49 people were shot ana killtwo mosques in new zealand's third-largest city of christchurch during friday prayer services. hundreds of mourners paid their respects at the site of the first shooting, the al noor mosque. others laid flowers at a msmorial site near the hospital where many victire being treated for injuries. several are still in critical erndition. today, family meidentified s

seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we're your retirement company. additional support has been ovided by: and by the corporation for toublic broadcasting, and by contributionour pbs station from viewers like you. thank you. from the tisch wnet studios at li ohari sreenivasan.rk, >> sreenivasan: good evening and apank you for joining us. in his first publiarance since returning from vietnam, president dona trump spoke today at the annual conservative political action conference in maryland. in a wide ranging, at times rambling speech that began with the president hugging a u.s. flag, mr. trump once aga s railed againcial counsel robert mueller's investigation of russian interference in t- 2016 electioing an expletive to describe it. >> they'rerying to take you out with ( bleep ) okay? with ( bleep ). >> sreenivasan: over more tha

seton melvin. the cheryl and philip mitein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. rbara hope zuckerberg. corporate funding is provided l by mut america-- designing customized individual rand grourement products. that's why we're your retirement company. radditional supas been provided by: and by the corporation for public broadcasting, and by contributions to your pbs thank you.om viewers like you. from t tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening, and thanks for joining us. the coents are still secret, the attorney general is still iaviewing, and the demands to see spcounsel robert mueller's report on the almost two-year investigation into president trump and russian election interference are growing. photographers tracked the movements of attorney general william barr as he left home this morning. yesterday, in a letter to congreional leaders, barr said he anticipated he might be "in a position to advise you of the special counsel's principal lusions as soon as this w

seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we're your retirement company. additional supportas been provided by: and by the corporation for public broadcastin and by contributions to your pbs yotation from viewers like you. gohan >> sreenivasan evening and thanks for joining us this sunday, march 17th. i'm hari sreenivasan. we're bringing you tonight's broadcast from the lamont- doherty earth observatory overloing the hudson river north of new york city. the observatory is part of columbia university's earth institute, where researchers and students work on complicated environmental issues facing the planet. we'll hear more about the research being done here and how it is helping advance our nding of climate change. but first, here are today's headlines. new zealanime minister jacinda ardern consoled community members at a mosque and p

seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundndion. rosa. walter. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we're your rerement company. additional support has been prided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thank you for joining us. a class action lawsuit challenging the trump administration's zero tolerance policy just got bigge it was the policy which separated more than 2,700 migrant children from their families at the u.s.-mexico border last spring. the federal judge overseeing the case said the government must add what may be thousands more children and families to the case. in a ruling late yesterday, judge dana sabted a ly-released report from the office of the inspector ral at health and human servi

seton melvin. the cheryl and philip milstein family.. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg. corporate funding is provided by mutual me

seton melvin. the cheryl and philip milstein family. dr. p. roy vagelos and diana t. gelos. j.p.b. foundation. rosalind p. walter. rb