sentences:  The site was laid out from 1961 onward (on an airfield built northeast of In Amguel and base camp between the Tuareg village of In Amugel and the well in In Eker of which the border was controlled and occupied by gendarmes).A base called DAM Oasis 1, then Oasis 2, was then built to not be visible from the road a few miles east of Tan Affela.France, having had to abandon aerial tests and replace them with less-polluting underground tests, opted for underground testing in marine (atoll) or desert zones.