N & S KOREA AFFIRM COMMITMENT TO PEACE

   Nuclear weapons topped the agenda, and Friday's summit will be the clearest sign yet of whether it's possible to peacefully negotiate those weapons away from a country that has spent decades doggedly building its bombs despite crippling sanctions and near-constant international opprobrium.
   Expectations are generally low, given that past so-called breakthroughs on North Korea's weapons have collapsed amid acrimonious charges of cheating and bad faith. Skeptics of engagement have long said that the North often turns to interminable rounds of diplomacy meant to ease the pain of sanctions - giving it time to perfect its weapons and win aid for unfulfilled nuclear promises.
   Advocates of engagement, however, say the only way to get a deal is to do what the Koreas tried Friday: Sit down and see what's possible.