U.S. service members stand at attention during the 33rd Beirut Memorial Observance Ceremony, Lejeune Memorial Gardens, Jacksonville, N.C., Oct. 23, 2016. A memorial observance is held October 23rd of each year to remember those lives lost during the terrorist attack at U.S. Marine Barracks, Beirut, Lebanon, in 1983. - U.S. service members stand at attention during the 33rd Beirut Memorial Observance Ceremony, Lejeune Memorial Gardens, Jacksonville, N.C., Oct. 23, 2016. A memorial observance is held October 23rd of each year to remember those lives lost during the terrorist attack at U.S. Marine Barracks, Beirut, Lebanon, in 1983.