. >> when we return we talk to former cia agent valerie payne who explains why nuclear weapons is the single greatest threat >>> and pope francis makes headlines. >> in ireland voters look to make history on a referendum for same-sex marriage. that's in "the week ahead". stay with us. >>> talks over iran's nuclear programme continue this week. and as the so-called p5+1 leaders try to hammer out a deal saudi arabia continues to protest. its leaders saying they want the same nuclear capabilities afforded to iran under any agreement. courtney kealy looks apt the build-up of nuclear arsenals worldwide. >> discussions we had were candid. >> reporter: at camp david president obama sought to reassure gulf allies threatened by a potential agreement with iran. >> we discussed not only the iranian nuclear deal, and the potential for us to ensure that iran is not obtaining a nuclear weapon. iran told gulf leaders that the u.s. would consider military force if it needed help. it did not sit well with iran. >> translation: what is america's business to comment on gulf business. they are seeking th

valerie payne talks about the threat of the nuclear proliferation. hear what the former c.i.a. officer has to say. >>> secretary of state john kerry is in beijing, meeting with top officials about china's activity in the south china sea. china has been claiming reefs and islands off the philippines and vietnam, and he shared concerns with the chinese premier. >> i urged china through the prime minister wen jiabao to take actions with everyone to reduce tensions and increase the prospect of a diplomatic solution >>> the pentagon denies reports that it's considering sending ships and aircraft to the region. al jazeera national correspondent jamie mcintyre has more from the pentagon. >> reporter: the source of the tension is a series of islands china has basically built on top of submerged reefs in some of the world's busiest shipping leaps in the south china sea. for example, here is the fiery cross reef as it appeared in a satellite photo last august. by march of this year it was built up enough to support an air spripstrip airstrip and work to build another. it is said that chi

valerie valerie payne joins us live. she was outed as a c.i.a. operative. "new york post," her name was leaked in retaliation for her husband's criticism of the iraq's invasion. before being forced to resign she was a nuclear expert and at one point preventing iran from obtaining a nuclear weapon. she'll join us in the next hour to discuss the spread, and why it's called the greatest existential threat. >> thank you >>> washington d.c. police are following leads in a murder happening steps from joe biden's official residence. four were found dead in a house after a vir authorities -- fire authorities believe was deliberately set. civilians of a hooded figure -- surveillance of a hooded figure was released by authorities. >>> raising the minimum wage - $15 an hour gained wide-spread support. jennifer london looks at life for workers making the current minimum wage >>> baseball practice, dirty dishes. >> it's bad muf that i'm gone for eight hours, to pick up another shift afterwards that's a total of 15-16 hours. >> reporter: she works tirelessly trying to su

valerie payne joins us tomorrow night about the threat of nuclear proliferation, hear what she has to say tomorrow night at 8:00 p.m. eastern, 5 pacific. >>> tonight, we are taking a deeper look at sex education in the u.s., and how it's impacting american kids. programs are different in practically every state. some only push for abstinence, others talk about contraception. the c.b.c. says 53% of teens are sexually active. a california judge issued an historic ruling condemning abstinence only. melissa chan has more. >> reporter: in 2012 some parents decided to sue a school distribute for failing to include information about sexually transmitted diseases and ways to prech pregnancy in -- prevent pregnancy in the curriculum. the context was a law saying that it sex education could not contain bias material. the judge had to decide whether teaching abstinence only was appropriate. the debate is not about what you feel is right or wrong the the acau decided to fight within the confines of science. the judge's decision is considered a big deal for opponents of abstinence only. 37 states