▁a ▁larger ▁ ▁prop ulsion ▁unit ▁and ▁used ▁semi - active ▁rad ar ▁hom ing ▁with ▁an ▁inf ra red ▁see ker ▁for ▁terminal ▁guidance ▁of ▁the ▁miss ile . ▁The ▁oper ational ▁ce iling ▁was ▁. ▁ ▁Test ▁fir ings ▁began ▁in ▁late ▁ 1 9 7 2 , ▁ ▁but ▁the ▁Se ek bat ▁program ▁did ▁not ▁make ▁a ▁great ▁deal ▁of ▁progress ▁and ▁was ▁cancel led ▁in ▁ 1 9 7 6 . ▁ ▁By ▁this ▁time ▁new ▁knowledge ▁of ▁the ▁Mi G - 2 5 s ▁capabilities ▁and ▁role ▁led ▁to ▁the ▁can cellation ▁of ▁the ▁program ▁because ▁the ▁miss ile ' s ▁cost ▁did ▁not ▁justify ▁its ▁proc ure ment . ▁ ▁See ▁also ▁Bra zo ▁R - 2 7 ▁( air - to - air ▁miss ile ) ▁ ▁References ▁Notes ▁ ▁Bibli ography ▁▁▁▁▁▁▁▁▁▁▁ ▁Category : General ▁Dynam ics ▁A IM - 0 9 7 ▁Category : Ab andon ed ▁military ▁ro cket ▁and ▁miss ile ▁projects ▁of ▁the ▁United ▁States <0x0A> </s> ▁Tur ó ▁del ▁Sam ont ▁is ▁a ▁mountain ▁of ▁Catal onia , ▁Spain . ▁It ▁has ▁an ▁elev ation ▁of ▁ 1 , 2 7 2 ▁metres ▁above ▁sea ▁level . ▁ ▁See ▁also ▁Mountains ▁of ▁Catal onia ▁ ▁References ▁ ▁Category : Mount ains ▁of ▁Catal onia <0x0A> </s> ▁Kar en ▁L . ▁M ohl ke ▁is ▁a ▁bi ologist ▁at ▁University ▁of ▁North ▁Carolina , ▁Chap el ▁Hill . ▁She ▁is ▁known ▁for ▁her ▁work ▁in ▁human ▁gen et ics ,