A 1991 railroad accident dumped 19,500 gallons of pesticide into which state's Sacramento River?

The Mystery Writers of America's award for best critical or biographical work is named for Poe and called what? A 1991 book about which actor, JFK's brother-in-law, is subtitled "The Man Who Kept the Secrets"? A 1991 Annie Leibovitz cover showed which actress nude and pregnant? A 1991 photo of Gaspra by the Galileo probe was the first close-up of which type of minor planet? A 1992 law introduced by Senator Alan Cranston aimed to reduce the use of paint containing too much of which element? A 1992 Paris retrospective of which short artist's life sold replicas of his cane with a hidden vial for absinthe? Which 1992 western has the line "I even thought I was dead 'til I found out it was just that I was in Nebraska"? A 1993 anthology of Asian American fiction is titled "___ Is Dead", naming which fictional detective?