Two of three Wabar impact craters in Rub' al Khali desert, Saudi Arabia. Original caption: Photo of the "11-Meter" crater; (left, discovered by Wynn in December 1994) and the Philby "A" crater (right, discovered by Philby in 1932) taken from the seif dune (foreground) of figure 2. On the left crater, one can see the sensor head of one of the magnetometers used for the magnetic survey conducted at the site.