bomb may have been "overfilled with plutonium to assure success". Only two other A-bombs tested in the Sahara facilities were more powerful: Rubis (<100 kt, 20 October 1963), and Saphir (<150 kt, 25 February 1965). Both were detonated underground at the In Ekker facilities. According to Lieutenant Colonel Warner D. Farr in a report to the USAF Counterproliferation Center "Progress in nuclear science and technology in France and Israel remained closely linked throughout the early fifties." Furthermore, according to Farr, "There were several Israeli observers at the French nuclear tests and the Israelis had 'unrestricted access to French nuclear test explosion data.'" Fallout Initial monitoring reported a radiation dose of 10 rad/h at 0.8 km from ground zero one hour after the blast, 10 rad/h at 28.5 km and 3 rad/h at 570 km. Monitoring at Fort Lamy (now N'Djamena), around 2,400 km from Reggane, reported 10−9 Ci/m3. For decades, documentation of the Gerboise tests remained heavily classified by the French government. The Ministry of the Armed Forces had maintained that the radioactive effects on humans present at the site would be "weak", and "well below annual doses." However, persons present at the site have since stated that protection gear was extremely minimal at the time of testing. In addition, ex-military officers have come forward with stories of being used as test subjects to study the effects of nuclear radiation on humans. Immediately following the explosion of Gerboise Verte (which yielded <1 kiloton), soldiers were sent within a 1 km radius of the explosion site, where they practiced combat exercises and drove tanks around the area. In total, these subjects were exposed to high levels of radiation for three hours. Following the exercises, the soldiers state that they were given showers as the only means of decontamination. Subsequent tests After Gerboise Bleue in February 1960, France conducted until April 1961 three additional atmospheric tests in Reggane facility's Saharan Military Experiments Centre. They were only "emergency devices", with yields deliberately reduced to less than 5 kilotons. Shortly after the final Gerboise bomb (Gerboise Verte), the French moved their nuclear testing to the mountainous In Ekker region, which housed an underground facility. In 1962, the Algerian War ended with the signing of the Évian Accords. Although the French military agreed to withdraw from Algeria within 12 months, Chapter III of the Évian Accords granted France "the use of a number of military