There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option $1,2,3$, or 4 ) the following sentence would best fit.

Sentence: Taken outside the village of Trang Bang on June 8, 1972, the picture captured the trauma and indiscriminate violence of a conflict that claimed, by some estimates, a million or more civilian lives.

Paragraph: The horrifying photograph of children fleeing a deadly napalm attack has become a defining image not only of the Vietnam War but the 20th century. _ (1) _ . Dark smoke billowing behind them, the young subjects' faces are painted with a mixture of terror, pain and confusion. _ (2) _ . Soldiers from the South Vietnamese Army's 25th Division follow helplessly behind. _ (3) _ . The picture was officially titled "The Terror of War," but the photo is better known by the nickname given to the naked 9 -year-old at its centre: "Napalm Girl"._ (4) _ .