Fans mark 40 years since death of Elvis Presley

Forty years have passed since the death of Elvis Presley, who passed away aged 42.

Dubbed the King of Rock and Roll, many wonder if he can still claim the title.

Since his death, rock music has evolved in a way he probably would not have imagined.

But it is still possible to see his influence in today’s popular music.

Al Jazeera’s John Hendren reports from Memphis.