Name the American progressive and heavy metal band founded by John Petrucci, Mike Portnoy, and John Myung in 1985.

Dream Theater have defined and extended the boundaries of progressive metal since 1986. The band's ability to create catchy, but musically complex songs and thematic concept albums have established them as one of the greatest progressive rock bands in the music industry.

Asked by Vasilii Kulev · Last updated 4 years ago · 17.9K views · SOURCE