An in-depth look at the Canadian rock band Rush, chronicling the band's musical evolution from their progressive rock sound of the '70s to their current heavy rock style.An in-depth look at the Canadian rock band Rush, chronicling the band's musical evolution from their progressive rock sound of the '70s to their current heavy rock style.An in-depth look at the Canadian rock band Rush, chronicling the band's musical evolution from their progressive rock sound of the '70s to their current heavy rock style.