Who led the Soviet Union from 1985 to 1991?

Which band released the 1984 hit "You Might Think"? Which band featuring brothers Alex and Eddie scored its first No. 1 hit with "Jump" in 1984? "The Reflex" was the first U.S. No. 1 hit for which band, whose "Hungry Like the Wolf" had peaked at No. 3? In which 1985 film does 17-year-old Marty McFly get home early one night — 30 years early? In which 1985 John Hughes film do five high school students endure a daylong Saturday detention? Which bird completes the title of the 1985 spy film "The ___ and the Snowman," starring Timothy Hutton and Sean Penn? Which author's 1985 bestseller "Lucky" joined short-titled hits like James Michener's "Texas" and Carl Sagan's "Contact… Which two Steves, co-founders of a small computer company, received the National Medal of Technology in 1985?