washington federal prosecutors open case ahmed abu khatallah monday tell jurors orchestrate 2012 attack u.s. diplomatic compound benghazi libya kill u.s. ambassador christopher stevens three americans khatallah await trial since 2014 capture team u.s. military fbi officials libya transport 13-day journey unite state aboard navy vessel open statement u.s. district court district columbia federal prosecutor john crabb say khatallah hat america vengeance play lead role organize sept. 11 2012 attack u.s. diplomatic mission benghazi khatallah say light fire fire mortar hear guilty men light fire khatallah face charge include murder provide material support terrorists sit table wear white shirt headphones allow hear arabic translation proceed defense attorney jeffrey robinson deny client anything plan attack evidence go show mr. abu khatallah participate attack say monday session include harrow testimony special agent scott wickland describe try get stevens state department staffer sean smith safety crawl belly thick black smoke fire engulf mission first hand ambassador crawl recall breathe last centimeter air grind ... yell guy come make within meter disappear crabb prosecutor also preview testimony jury hear witness claim hear khatallah discuss involvement attack one witness late pay million help unite state lure khatallah spot capture tell jurors hear defendant say would kill americans night crabb say crabb also show grainy video footage night attack image half-dozen suspect associate khatallah khatallah appear one video arm militia enter room hold closely guard map record robinson say client go mission see happen warn people steer clear gunfire also say government witness people lie trial resume tuesday expect last several weeks trial allege ringleader benghazi attack begin washington