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 provided by: and by the corporation for publicroadcasting, and by contributions to your pbs statio fthank you.s like you. from the tisch wnet ncudios at n center in new york, hari sreenivasan. >> sreenivasan: good evening and thanks for joining us. president trump began his day today disping a "new york times" report that details of friday's u.s.-mexico agreement were "already promised" in discussions between officials that took place months ago. the "times" reported unnamed officials from both countries said the mexican government hadlready pledged to send troops to its southern border in march. president ump tweeted that the report was "false" and "we have been trying to get se of these border actions for a long time..." but didn't get them," ...until our signed agreement wit

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. h additional suppo been provided by: and by the corporation for public broadcasting, and by contributions to your pbs n from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasa >> sreenivasan: good evening and thank you for joining us. trusmp administration offici in washington and in the middle east are holding talks with allies in the region, as the u.s. reprepares to add sanctions against iran tomorrow. before leaving for saudi arabia and the united arab emirates this afternoon, secretary of state mike pompeo said the u.s. is preared to negotiate directly with iran with no precondatitions, but sanctions will continue. >> on monday, there will be a signifint set of new sanctions, and the world should know that we will continue to make sure it's underst

p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. g. barbara hope zuckerb corporate funding is providedua by mof america-- designing customized individual tirement products. that's why we're your retirement company. additional suppo 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 thank you for joining us. the u.s. milary confirmed today that a modified iranian surface-to-air missile was launched at an amecan drone-- in an attempt to disrupt surveillance of thursday's attack on two oil tankers in the gulf of oman. in a statement, u.s. central command also said a houthi surface-to-air missile shot down a u.s. drone earlier this month in yemen, "enabled by iranian assistance." on the sunday talk shows, secretary of state mike pompeo isain blamed iran for the attacks and said heaching out to allies for support. >> china gets over 80% of its

p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg. corporate funding is provideof by mutuaamerica-- designing customized individuan group retirement products. that's why 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. be more. be more. pbs.a mariver: perhaps the greatest mystery... is the human brain. cain only the past few s, scientists have made incredible leaps in our understanding. and we are just now raveling the secret of h the brain can change throughout our lives, leading to incredible transformation. hi merzenich: we have new understanding that the person that is within us is actually a product of change that occurs within our lifetime. 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.ve you'een given this gift. that's what brain plasticity is. seidler: the brain is adaptively c

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 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 stateand china put their tariff war on hold after president trump and president x jinping the g-20 summit in osaka, japan today. the agreement does not endal tariffady in place, but the president said the u.s. will not impose new 25% tariffs on $300 billion in chinese imports that he had threatened, and that we will lift some restrictions on the chinese technology company huawei. in return china will reportedly buy mo american agricultural products and trade talks will resume. >> we're going to work wit

p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter. barbara hope zuckerberg.

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 individua and group retirement products. that's why we're your retirement company. additional support has been provided by: anby 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 sreenivas. >> sreenivasan: good evening and thank you for joining us. multiple news reports cited a senior u.s. official claiming that iran fired a surface-to-air missile at an american drone today. this, as the united states continues to blame iran forrs attacks on tann the gulf of oman thursday. the two tankers were hit after passing through the strait of hormuz. iran has denied being involved in the attack. the 23 crew members from the norwegn tanker were flown to dubai today after being held for two days in iran. a dutch ship and the u.s. navy srescued the 21 crew memb aboard the

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 haseen provided by: and by the corporation for public broadcasting, and by contributions to your pbs u.ation from viewers like thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thank you for joining us. president trump said late yesterday that the u.s. will n"" indefinitely suspend" the ooreat of tariffs on billions of dollars of mexican, after three days of negotiations over the increasing number of migrants crossing the u.s.- mexico border. the news came in a tweet from the president last night that said mexico "agreed to takes strong measu stem the tide of migration through mexico, and to our southern border." formally, the two cos issued a joint statement which outlined mexico's enforcement actions without giving

p. roy vagelos and diana t. vagelos. the j.p. foundation. rosalind p. walter. barbara ho zuckerberg. rporate funding is provided by mutual of america-- edesigning customndividual and group retirement products. that's whye're your retirement company. additional support has been provided by: and by the corporation for public broadcastin by contributions to your pbs station from viewers like yo thnk you. e. be m pbs. milan's monumental cemetery. while there are many evocative cemeteries in europe, this one -- with its emotional portrayals of the departed and their heavenly escorts -- in the melodramatic art styles from the late 19th and early 20th centuries -- is in a class by itself. it's a vast garden art gallery of proud busts and grim reapers, heartbroken angels and weeping widows... soldiers too young to die. acres of grief, (instrumental music) >> you're earned the right to be happy in your life and retirementhould bring the freedom to do things you've always dreamed of. but if fears about money are holding you back, you're n alone. what if i told you there's a smart way for you t