In a behind-the-scenes clip from his upcoming DVD, The Wall Live, Roger Waters visits the grave of his grandfather George Henry Waters, who was buried in Italy after being killed in action during World War I.

Roger is joined by his sons India, Jack and Harry at the tomb.

The Wall Live follows Waters and his band during their 2010-13 tour.

"I was determined that it should be less specifically about my predicament and my story and my journey,"

Waters says of the film's theme, "and more a general look at what it means to those of us who become victims to what seems to be an insatiable desire by those with the reins of power in their hands to wage war on others to further whatever their aims might be."

The Wall Live lands December 1.