Why we may not realize this goal in Obama’s lifetime?

President Obaha came to Hiroshima. The visit to Hiroshima by a sitting American president is meaningful. A rehash is not welcomed. His speech in Prague was, made me move. But he didn’t say nothing new in Hiroshima. He all the way came to Hiroshima from Prague said nothing new. He said that we may not realize this goal in his lifetime. I don’t think so. Because we have already abolished the chemical weapons and the antipersonnel landmines. Only if the nuclear weapon countries agree, we can abolish nukes. Obama shouldn’t say we may not realize the goal now. He should say to other nuclear countries to start the negotiation to abolish nukes now. That’s his last mission.