. >> pbs newshour weekend is made possible by: bernard and irene schwartz. esue and edgar waim iii. seton melvin. the cheryl and philip lstein 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'shy we're your retirement company. additional support has bee provided by: and by the corporation for publ 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 white house insisted today that president trump did not encourage violence against democratic congresswoman ilhan omar when he tweeted a video that included snippets of comments omar made in a speech last month interspersed with footage of the world trade center's twin towers burning on 9/11. the tweet, posted friday, remains onr. trump's twitter feed. the video in it includes snippets of omar's speec

. >> pbs newshour weekend is made: possible bernard and irene schwartz. sue and edgar wachenheim iii. seton melvin.ch thyl and philip milstein family. dr. p. royagelos and diana t. vagelos. the j.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 foric puroadcasting, and by contributions to your pbs station from viewers like you. thank you. n rom the tisch wnet studios at lincoln centerw york, hari sreenivasan. >> sreenivasan: go evening, and thanks for joining us. there has been a shooting at a synagoe in poway, california, a community northeast of san diego. police say a 19-year-old man is in custody. he had an a.r.-style assault rifle in his car wn he was arrested. late this afternoon, police confirmed one person was killed and three are hospitalized. one ofhose is a child. their condition is unknown. here is what we do know

. >> pbs newshour weekend is made possible by: bernard and irene schwartz. d edgar wachenheim iii. seton melvin. the cheryl and philip milstein vagelos.oy vagelos and diana t. the j.p.b. foundation. rosalind p. walter. barbara hope zuckeerg. corporate funding is provided by mutual of america--st designing ized individual and group retirement products. that's why we're your retirement company. additional support has been provided by: and by the corporation for b public broadcasting, a contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at wlincoln center in rk, hari sreenivasan. >> sreenivasan: good evening, and thanks for joining us. today marks the 20-year anniversary of the columbine high school shooting near the denver suburb of littleton, colorado. the two gunmen, students at the school, killed 12 studen and a teacher that day before killing themselves. yesterday, hundreds ed a vigil near the high school at the columbine memorial, which openedn 2007. >> it makes it not just an empty g.or upsetting or sad feel it's more of aeep impact

. >> pbs newshour weekend is made possible by: bernard and irene schwartz. sue and edgar wachenheim iii. seton melvin. the cheryl and philip milstein ramily. dr. vagelos and diana t. vagelos. the j.p.b. foundation. p rosaliwalter. barbara hope zuckerberg. corporate funding is provided by mutual de america-- gning customized individual and group retirement products. that's why we're you retirement company. additional support has been provided by: and by the corporation for ic 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 trump ministration's policy of keeping asylum seekers in mexico while they wt for court hearings will continue at least temporarily. in a ruling late yesterday, a three-judge appellate court panel issued a stay of a lower court ruling that bloc trump administration policy called the "migrant protection protocols" program. since january, hundreds of asylum seekers,

next on pbs newshour weekend.ws >> pbs ur weekend is made possible by: bernard and irene schwartz. sue and edgar wacnheim iii. seton melvin. the cheryl and philip milstein family. ia dr. p. roy vagelos and t. vagelos. the j.p.b. founlition. ro p. walter. barbara hope zuckerberfu corporating is provided by mutual of america-- designing customized individual and group retirement products.w that's wre your retirement company.ti adal 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.as >> sreen: good evening and thank you for joining us. israel's prime minister benjamin netanyahu sa last night that he would move to annex jewish settlements in the west bank if he wins a fifth term in tuesday's election. >> ( translated ): the question you are asking is an interesting one, w stage?o to the next the answer is yes, we will go to the next stage in imposing israeli sovereignty in the west bank. >> sreenivasan: more

pbs newshour week" >> pbs newsur weekend is made possible by: bernard and irene schwartz. sue and edgar wachenheim iii. 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 provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you.is from the wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thank you for joining us. mourners came to honor the victims, the day after a gunman opened fire in a southern california synagogue, killing a 60-year-old woman and injuring three others. the 19-year-old whitofman suspectehe hate crime attack remains in custody. a growing number of flowers and messages covered a ml on the street outside the chabad of poway synagogue-- just nort

." >> pbs newshour weekend is made possible by: bernarand irene schwartz. sue and edgar wachenheim iii. 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-- signing customized individual and group retirement products. at'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 ation from viewers like you. thank you. atom the tisch wnet studio lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thanks for joining us. in washington, d.c. the topic continues to be the u.s.-mexico border, the president's threat to somehow close it, the increase in asylum-seekers, and e state department's statement that it will cut off aid to three central american countries. white house counselor kellyanne conway sd the president is serious about closing the ose metrics.: you're giving. what

. >> pbs newshour weekend is made possible by: bernard and irene schwartz. sue and edgawachenheim iii. 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 ro and group retirementcts. that's why we're your retirement company.ad tional support has been provided by: innd by the corporation for public broadca 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. president trump used a speech to the republican jewish coalition's anal leadership meeting in las vegas today to ispeat his claim that ther crisis at the u.s.-mexico border and that asylum-seekers should be turned back. >> and i told my people yesterday, our country's full. we're full. our sys our country is full. can't come in. our country is full. what can yo

next on pbs newshour weekend.ws >> pbs ur weekend is made possible by: bernard and irene schwartz.sue and edgar wacnheim iii. seton melvin. the cheryl and philip milstein family. ia dr. p. roy vagelos and t. vagelos. the j.p.b. founlition. ro p. walter. barbara hope zuckerberfu corporating is provided by mutual of america-- designing customized individual and group retirement products.w that's wre your

pbs newshour week" >> pbs newsur weekend is made possible by: bernard and irene schwartz.dgar wachenheim iii. 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

access group at wgbh access.wgbh.org >> pbs newshour weekend is made possible by: bernard and irene schwartz. suand edgar wachenheim iii. seton melvin. erthe and philip milstein family. dr. p. roy vagelos and diana t. vagelos. the j.p.b. foundation. rosalind p. walter barbara hope zuckerberg. ate funding is provided by mutual of america-- designing customized individual aennd group retirproducts. that's why we're your retirement company. additional support has been provided by: rand by the corporation public broadcasting, and by contributions to your pbs station from viewers like you. thank you. be more. pbs. maria shriver: perhaps the greatest mystery... ra is the human. in only the past few decades, scientists have made incredible leaps in our underanding. and we are just now unraveling the secret of howe ain can change throughout our lives, leading to incredible transformation. merzenich: we have this new understanding that thepe on 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 ofur era, because it