Detail Showing F-15 Aircraft ren large Protective Aircraft Shelters (PAS) and F-15 aircraft are clearly visible in his satellite image of RAF Lakenheath in the United Kingdom. AIso visible are /arious service vehicles in front of the shelters, three of which have open front ioors. There are 60 PAS at the base (see Appendix C), 33 of which currently storę a :otal of 110 U.S. B61 nuclear bombs