Prime Minister Ariel Sharon met this morning with the family members of the four Israelis missing in Lebanon. The four include three soldiers - Benny Avraham, Omar Souad, and Adi Avitan - as well as businessman Elchanan Tenenbaum. Gen. (res.) Ilan Biran, head of the team for the return of captured and missing soldiers, also participated in the meeting. Sharon said that Israel is concentrating its efforts on receiving a sign of life from the abducted Israelis.