Book reports on secrecy measures for French workers at Dimona

Dispatched US physicists as inspectors to Dimona, led by Floyd Culler; visits postponed, no equipment allowed, false walls built to hide reprocessing plant

Lead American inspector noted newly plastered walls hiding access to subterranean reprocessing plant

French engineers helped build Dimona nuclear reactor and secret reprocessing plant for plutonium separation, confirming weapons intent

French engineers built nuclear reactor and secret reprocessing plant at Dimona, with 2,500 French citizens living there by end of 1950s