The first plan, following the White House policy guidance, was developed in 1960, consisting of a list of targets (the National Strategic Target List, or NSTL) and the assets to be used against each target. The targets themselves were pulled from the Bombing Encyclopedia, which listed over 80,000 targets of interest. This first SIOP was extensively revised by a team at the RAND Corporation to become SIOP-62, describing a massive strike with the entire US arsenal of 3,200 warheads, totaling 7,847 megatons, against the USSR, China, and Soviet-aligned states with urban and other targets being hit simultaneously. Nine weapons were to be "laid down" on four targets in Leningrad, 23 weapons on six target complexes in Moscow, 18 on seven target areas in Kaliningrad, etc.