judy and josh weston. the cheryl and philip milstein family. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are 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 states and china today formally ratified a climate-change agreement that came from the u.n. climate conference in paris last december. it has already been adopted by more than 175 countries. in a ceremony today ahead of the "group of 20" economic summit in hangzhou, china, president obama and china's president xi jinping committed the world's two biggest economies to a

judy and josh weston. the cheryl and philip milstein family. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are 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, alison stewart. >> stewart: good evening and thanks for joining us. it happened 15 years ago today- the worst attack on american soil since pearl harbor- when terrorists hijacked four commercial passenger jets and used them as weapons against symbols of the u.s. economy and military. today, on this landmark anniversary, at three memorial sites, america remembered. >> reporter: the ceremony in new york marked the moment when the first plane hit the trade

judy and josh weston. the cheryl and philip milstein family. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are 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, allison stewart. good evening and thanks for joining us. new york governor andrew cuomo says new york city was "lucky" there were no fatalities caused by last night's explosion in or near a dumpster on a manhattan street. a second, unexploded device found in a plastic bag four blocks away was "similar in design" and is being examined at f-b-i headquarters in quantico, virginia, along with remnants of the first device. >> stewart: shrapnel and flying debr

judy and josh weston. the cheryl and philip milstein family. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are 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. we're coming to you tonight from the studios of ketc, our pbs affiliate in st louis, missouri. for the second time in this year's race for the white house, republican presidential candidate donald trump has publicly raised the specter of violence against his democratic opponent, hillary clinton. campaigning in houston, texas, today, trump was silent on the subject. but last night,

judy and josh weston. the cheryl and philip milstein family. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are 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. >> police in charlotte, north carolina, said this afternoon they would release their own dash-cam videos of tuesday's fatal shooting of a brack man, keith scott, this as people took part in a fifth day of protests. police chief kerr putney said it had been decided releasing the the videos would not adversely impact the investigation. he said he was in possession of a hand gun, in

judy and josh weston. the cheryl and philip milstein family.