chief foreign affairs correspondent margaret warner begins our coverage. >> warner: smoldering wreckagepakistani roadside was all that remained of the taliban commander's vehicle, hours after he died in it saturday. today, in vietnam, president obama officially announced a u.s. drone strike killed mullah mohammed akhtar mansour. >> it has been confirmed that he is dead. and he as an individual who as head of the taliban was specifically targeting u.s. personnel and troops inside afghanistan. >> warner: mullah mansour took over the afghan taliban last summer, after the group finally announced that long-time leader, mullah omar, had died in 2013. the new leader faced down rivals, in part by rejecting afghan- and u.s.-backed peace talks. under his direction, taliban forces briefly seized the northern afghan city of kunduz last september, and carried out a bloody assault in kabul itself, in april, killing 64. word of his death was welcomed by afghan chief executive abdullah abdullah: >> ( translated ): he was in charge of all terrorist attacks in afghanistan and he had direct contact with o

here to tell us more about both is chief foreign affairs correspondent margaret warner. so first let's talk about the bill, what's in it and what's the status of it. >> the bill, hari, would carve out a special exemption in what's called the foreign sovereign immunity act which every country has a similar act and observe, which is you don't sue foreign governments, with a few narrow exceptions. there was an exception made for terrorism but only if you were on the state sponsored terrorism list which saudi isn't. so the 9/11 victims families have been trying to push this, get this bill in a court. it was rejected by a federal judge in september saying, sorry, violates this act. so that's sort of what's new here. it passed unanimously a session ago in the senate but now it's run into a buzz saw of white house opposition. you have president obama telling charlie rose if we let this happen we'll have foreign citizens suing our government. all the senior members of the administration have come out against this. two weeks ago, senator lindsey graham, one of the 22 co-sponsors

for the pbs newshour, i'm margaret warner. >> woodruff: we'll look at the nuclear threat in the worlday, after the news summary. the events at hiroshima came after major economic powers wrapped up a two-day "group of seven" summit in japan. in a warning aimed at china, the leaders opposed unilateral actions in the east and south china seas. instead, they called for peaceful resolutions to territorial disputes. beijing responded that the g-seven should stick to economic matters. there is word that iran is honoring all its major obligations, under the nuclear deal it signed with world powers last year. the "associated press" obtained the confidential assessment by the u.n.'s nuclear agency. it says tehran has now corrected a previous violation. under the deal, iran won relief from international sanctions in exchange for limits on its nuclear activities. the u.s. presidential campaign was strictly a west coast affair today. all three candidates campaigned with an eye on the calendar-- and the date of june 7. lisa desjardins has our report. >> so i want to make a big play for california.