A group of scientists and other experts are looking at the viability of disposing tons of weapons-grade plutonium in the desert in southeastern New Mexico. A preliminary report from the National Academies of Sciences, Engineering and Medicine was issued Friday. The group looked at the government’s plan to dilute 34 metric tons of plutonium and ship it to the Waste Isolation Pilot Plant. But the group said there may not be enough space at the current facility to hold that much safely. The US Government is trying to satisfy a nonproliferation agreement with Russia. The group says it would take 31 years to dilute all 34 metric tons of plutonium.