Billboard magazine lists the band Chicago as the leading singles chart group of the 1970s.  With more than 21 million-selling albums, Chicago has secured a place in music history.  With its legendary horn section and distinctive vocals, Chicago remains one of the longest-running and most-successful pop/rock groups. 

VOA's Larry London had the opportunity to talk with founder and lead singer Robert Lamm, and trumpet player Lee Loughnane at Wolf Trap National Park for the Performing Arts in Vienna, Virginia.