BEIJING (AP) — Japan’s top nuclear envoy joined other negotiators Sunday in downplaying expectations for a new round of talks on North Korea’s disarmament, saying it would be tough to work out a detailed plan for verifying the North’s past nuclear activities. North Korea — which conducted a nuclear test in 2006 — agreed last year to disable its reactor in exchange for aid. But the North recently denied having agreed to allow inspectors to take samples from its nuclear complex to verify its past activities.—-Contact The Daily Reveille’s news staff at [email protected]