officials say his real name is mohammed emosi. he took part in the beheading of hostages. officials are trying to determine if he was hit by the air strikes. >>> also, i.s.i.l. claims responsibility for an explosion in lebanon, killing 43 people, in an area considered an hezbollah stronghold. >> in iraq, air strikes at i.s.i.l. positions in and around sinjar. kurdish peshmerga prepare to launch an offensive to retake the town sitting on the supply line. vicinity is at the -- jamie mcintyre is at the pentagon. >> the u.s. military is relying on the anti-i.s.i.l. fighting force - battle hardened kurdish peshmerga troops. once again the u.s. is sporting them in the air, on the ground, but the pentagon insists not on the front lines. >> the attack began at dawn, kicked off by three doze in strikes, conducted by american drones and a b 1 bomber. the u.s. has special operations commandos on the ground on sinjar mountains, over looking the area below. u.s. troops are helping to direct the attacks. which u.s. forces claim killed 50 i.s.i.l. fighters. the objective to free sinjar f