walter, in memory of george o'neil. barbara hope zuckerberg. meorporate funding is provided by mutual ofca, designing customized individual and group retirement products. that's why we're your retirement company. additional support has been provided by: and by the corporation for public broadcasting, a private corporation funded by the american people. and by contributions to your pbs station fr viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, megan thompson. >> thompson: good evening and thank you for joining us. president trump ordered the withdrawal of nearly all 100 s. troops currently in northern syria-- as turkey wages a military offensive againstds syrian kn the region. the president first ordered a small number of u.s. troops to a leave the area week ago. this morning defense secretary mark esper said arl u.s. troops being evacuated assurkish- backed air and ground attacks continued today. >> i spoke with the president last night after discussions with the rest of the national security team and he

walter, in memory of george o'neil. barbara hope zuckerberg. corporate funding is provideof by mutuamerica, designing ucustomized indivand group retirement products. that's why we're your retirement company. additional support has been provided by: and by the corporation for public broadcasting, a private corporation funded by the american people. and by contributions to your pbs station from viewers like yo thank you. u. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. sreenivasan: good evening, and thanks for joining us. the state department missed a congressional deadline yesterday to send cuments related to the achment inquiry. secretary of state mike pompeo, who was meeting withfireek als in athens today, said the state department sent a to congress last night and would "do all the things we are required by law."hi on his way to virginia golfia course this morning, the president tweeted angry remarks about democrats, the press and republican senator mitt romney, who criticized the president on twitter yesterday.

walter, in memory of george o'neil. barbarhope zuckerberg. corporate funding is provided by mutual of america, designing customized individual and group retirement products. that's why we're you retirement company. additional support has bee provided by: and by t corporation for public broadcasting, a private corporation funded by the americaneople. yo and by contributions t pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new yo, alison stewart. >> stewart: good evening. thanks for joinings. will they stay or will they go? the fate of brexit, britain's long-running plan to exit the european union, remains unknown today. an extraordinary saturday session of parliament ended with a vote that delays a decision oi primster boris johnson's recently-negotiated agreement with the e.u. >> stewart: johnson presented divided house of commons today, hoping for an end to years of debate. >> and now is the time for this great house of commons to come together and bring the country together today. >> hear, hea

walter, in memory of george o'neil. barbara hope zuckerberg. c forporading is provided by mutual of america, designing customized individual and group retirement products. that's why we're ur retiment company. additional support has been provided by: d by theorporation for public broadcasting, a private corporation funded by the american peop. and by contributions to your pbs station from viewers like you. thank you. be more. pbs.

walter, in memory of george o'neil.rovided icustomized indl and groupigning retirement products. that's why we're your rerementdiompany. onal support h been provided by: and by the corporaon for public broadcasting, a private corporation funded by th american people. and by contributions to your pbs station from viewers lik you. thank you. be more. pbs. maria shriver: perhaps the greatest mystery... is the human brain. in only the past few decades,cientists have made incredible leaps in our understanding. and we are just now unraveling the secret of how the brain can change throughout our lives, leading to incredible transformation. merzenich: we have this new understanding that the it person that isn us is actually a product of change thatifccurs within ourime. this is new science. it's one of the great discoveries of our era, because it has the potential of giving everyone a better life. you've been given this gift. that's what brain plasticity is. seidler: brain is adaptively changing, modifying, making new connectio

walter, in memory of george o'neil. barbara hope zuckerberg. ro corporate funding isded by mutual of america, designing cupomized individual and gr retirement products. that's why we're you c retiremepany. additional support has been provided by: and by the corporation for public broadcasting, a private corporation fued by the american people. and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, megan thompson. >> thompson: good evening, and thanks for joining us. the trump administration's acting secretary of homeland security, kevin mcaleenan, resigned last night. president trump made the surprise announcement on twitter saying, "kevin, now, after many years in government, wants to spend more time with his family and go to the private sector." mcaleenan, the president's fourth homeland security secretary, was appointed just six months ago. on monday, protestors against the administration's immigratioo cies forced mcaleenan off stage before he could speak at georg

walter, in memory of george o'neil. barbara hope zuckerberg. corporate funding is provided

walter, in memory of george o'neil. 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 provided by: and by the corporation for public broadcastinrivate corporation funded by the american people. and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln cent in new york, hari sreenivasan. re >>ivasan: good evening and thanks for joining us. there is a second whistleblower who says they haeb fsthand information about president trump's conversation with the president of ukraine whichim triggered thachment inquiry, and there may be others. news of anotr whistleblower was first reported this morning on abc. >> attorney mark zaid told me is a member of the intelligence community with firsthand information on some of the allegations at issue. the second whistleblas been interviewed by the inspector general and attorneys say theyave the full