San Francisco Giants relief pitcher Brian Wilson pitches to the Texas Rangers in the ninth inning during Game 1 of Major League Baseball's World Series in San Francisco, on Oct. 27. Mike Blake/Reuters
Former Cuban leader Fidel Castro speaks during celebrations to commemorate the 50th anniversary of the creation of the Committees for the Defense of the Revolution (CDR) in Havana, on Sept. 28. Desmond Boylan/Reuters
In this Feb. 11, 2009 file photo, actor Joaquin Phoenix arrives for a taping of 'The Late Show with David Letterman' in New York. Charles Sykes/AP/File
Former US president Abraham Lincoln, is shown in this November 8, 1863 file photo. Alexander Gardner/AP/File
Author Ernest Hemingway is shown in this undated photo. AP
This is an undated photo of a sketch of Gen. Ulysses S. Grant. AP
This portrait shows British scientist Charles Robert Darwin, who proposed the theory of evolution. AP
Painting of Mogol conqueror Genghis Khan, from an exhibition in Mongolia on the 840th anniversary of his birth.
'Self-portrait with Felt Hat' by Vincent van Gogh. Newscom
Billy Gibbons of ZZ Top performs at the Center in Dallas, Texas. Jason Janik/Splash News/Newscom
Former Red Sox center fielder Johnny Damon signing copies of his 2005 book, Idiot, at Barnes and Noble in Boston, Mass. Damon, now clean shaven, plays for the Detroit Tigers. Melanie Stetson Freeman/Staff
Ernesto 'Che' Guevara, a legendary guerrilla who fought with Fidel Castro in Cuba, is shown in this June 1962 file photo. AP/File
This image made from video broadcast on Oct. 7, 2001 shows Osama bin Laden at an undisclosed location. Al-Jazeera/AP/File
In this photo released by the Sigmund Freud Museum in Vienna former Austrian psychoanalyst Sigmund Freud is pictured in 1931. Sigmund Freud Museum/AP
Charles Manson, whose followers murdered Sharon Tate, is shown in this Aug. 1980 file photo. Newscom
Western leaders are expressing outrage after Islamic State militants released a video claiming to have killed Peter Kassig, an aid worker in Syria who was formerly a U.S. soldier. Addressing Obama, a man threatens to "slaughter your people in your streets."
ByMariam Karouny, Reuters
Islamic State militants said in a video on Sunday they had beheaded U.S. hostage Peter Kassig and warned the United States they would kill other U.S. citizens "on your streets."