Explorer Christopher Columbus arrives back in Lisbon, Portugal, aboard his ship Niña from his voyage to what is now The Bahamas and other islands in the Caribbean.
Gay rights: Oncale v. Sundowner Offshore Services, Inc.: The Supreme Court of the United States rules that federal laws banning on-the-job sexual harassment also apply when both parties are the same sex.
Afghanistan: Seven American Special Operations Forces soldiers and 200 Al-Qaeda Fighters are killed as American forces attempt to infiltrate the Shah-i-Kot Valley on a low-flying helicopter reconnaissance mission.