Data to be public on chemical warfare The Reagan administration plans to make public this week declassified intelligence in-telligence data claimed to document Soviet involvement in the chemical warfare deaths of more than 10,000 persons per-sons in Laos, Cambodia and Afghanistan. The report is being issued in an attempt at-tempt to lay to rest lingering doubts about the accuracy of repeated U.S. charges that the Soviet Union has used deadly and incapacitating chemical agents in Afghanistan.