sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional suppo 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. president barack obama has begun a three-day visit to vietnam, starting a week-long trip in asia meant to enhance trade and security ties with allies in the region. the president arrived in vietnam's capital, hanoi, in his first visit to the former enemy of the united states. vietnamese leaders are looking for obama to lift the long- standing u.s. embargo on selling weapons to vietnam, as a deterrent to the growing influence of neighboring china. the president is expected to pressure vietnam to improve its record on human rights, and tout his pr

sue and edgar wachenheim, iii. 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, megan thompson. this is pbs newshour weekend. >> thompson: good evening, and thanks for joining us. the heavily-fortified, four- square-mile "green zone" in iraq's capital of baghdad is home to government offices and foreign embassies, and previously housed american occupation headquarters. today, for the first time, the green zone was breached. after pulling down a section of the perimeter wall, thousands of protesters loyal to controversial shiite cleric muqtada al-sadr broke into parliament, chanted anti- government slogans and ransacked the building. al-sadr and his followers oppose thgovernment of prime m

sue and edgar wachenheim, iii. 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 wttw in chicago, hari sreenivasan. >> sreenivasan: good evening and thanks for joining us. the presidential primary season is nearing its end with only nine states left to vote. on tuesday, oregon holds primaries for both republicans and democrats, while democrats hold a primary in kentucky. that's where former secretary of state hillary clinton was campaigning today, speaking to supporters in louisville and fort mitchell. vermont senator bernie sanders, who beat clinton in west virginia and indiana this month and vows to compete all the way to the national convention, also campaigned in kentucky this weekend. businessman donald trump, now only 103 delegates shor

sue and edgar wachenheim, iii. 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 thank you for joining us. search efforts continued today to unravel what happened to the egypt air flight that crashed in the mediterranean on thursday, killing all 66 on board. egyptian officials denied reports they had located the plane's black boxes on the bottom of the sea. the boxes contain crucial cockpit voice recordings and flight data. the u.s. navy has joined the search, which has turned up plane wreckage and debris, including human remains and personal belongings. french investigators said just before it vanished, the plane sent signals indicating smoke h

sue and edgar wachenheim, iii. 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, soledad o'brien. >> o'brien: hello and thanks for joining us. a pivotal presidential primary in the republican race for white house is two days away, in indiana. of 10 states left to vote, indiana is the largest delegate prize left until the last primary, in california, in june. in indiana, the republican winner will take most of the state's 57 republican delegates. new york businessman donald trump is aiming to stretch his 430 delegate lead in the race for 1,237 delegates needed to be nominated. he's closing in on 1,000. texas senator ted cruz is trying to stop trump's momentum, and to help him win indiana, t

sue and edgar wachenheim, iii. 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, lisa desjardins. >> reporter: good evening and thanks for joining us. presumptive republican presidential nominee donald trump says if he's elected president, he would ask allies from saudi arabia and south korea to germany and japan to pay 100% of the cost of u.s. armed forces defending their countries. trump made the remark today at the annual memorial day weekend "rolling thunder" motorcycle rally in the nation's capital. >> you know, you look at the 28 nato countries, many of those countries are not living up to their obligations of paying us. so we're protecting nato, we're protecting these countries, and

sue and edgar wachenheim, iii.porate 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, megan thompson. >> thompson: good evening and thanks for joining us. that monstrous wildfire in the province of alberta, canada, has expanded to cover almost 800 square miles, an area the size of mexico city, and it's expected to grow even further. but there's a 70% chance of rain in the area tonight, which could give firefighters some desperately needed help. the fire has wiped out the town of fort mcmurray, and almost 100,000 residents of the town and surrounding areas have been forced to evacuate, to edmonton, calgary, and other cities. hundreds of structures in fort mcmurray have burned to the ground. 500 fire

sue and edgar wachenheim, iii. 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, lisa desjardins. >> desjardins: good evening, and thanks for joining us. it is a night of tense watching and waiting as war with the islamic state group appears to be escalating on two fronts tonight-- in syria and in iraq. isis militants are advancing in syria, in what the syrian observatory for human rights says is the group's biggest offensive in two years near syria's border with turkey. isis also gained ground today near the northern syrian city of aleppo, fighting rebel forces who oppose syrian president bashar al-assad. various rebel groups are backed by the u.s., turkey, and saudi arabia. more than 160

sue and edgar wachenheim, iii. 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, this is pbs newshour weekend. >> stewart: good evening and thanks for joining us. the flow of migrants and refugees to europe's main entry point, greece, is going down, but the financial cost to the nation welcoming the most migrants, germany, is going up. since the european union cut off entry to migrants leaving turkey and arriving by boat in greece, new arrivals in greece have dropped 90% to fewer than 3,000 in april, according to the e.u. border control agency frontex. the e.u. is now sending refugees from syria, iraq, and afghanistan back to turkey, and paying turkey to accept them. still, some 8,000 refu

sue and edgar wachenheim, iii. 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 of lincoln center in new york, megan thompson. >> thompson: good evening, and thanks for joining us. the raging wildfire that has forced 90,000 people to evacuate their hometown in canada has now spread across 600 square miles and is still growing. the blaze began six days ago in fort mcmurray, in the canadian province of alberta, 200 miles north of edmonton. alberta's premier said today the fire is "out of control," but no other community lies in its path. 500 firefighters are working to contain a fire fanned by high winds and feeding on dry forest. many fort mcmurray residents worked in a nearby tar sands oil extraction project. their nei