This is a great story about how the song "White Christmas" was the start of the end of the Vietnam War with the USA evacuating Saigon. The story is interesting because of the way it was carried out and the importance this day holds in history.
The reading is covers Pre-intermediate to advanced levels. Advanced levels can extend the discussion about the history of the war or maybe a war they were personally involved in closer to their country.
Its a 30 to 40 minute lesson.