What major environmental disaster occurred off Alaska's shore in 1989?

Exxon Valdez oil spill

What is Ron Weasley’s Patronus? In boxing, what term refers to knocking your opponent down three times in one round, leading to an automatic win for some jurisdictions? Where is the annual Macy's Thanksgiving Day Parade held Who united England's Anglo-Saxon kingdoms under a single ruler for the first time? Who is nicknamed "The Greek Freak"?