December 6, 2012
From 2012: The Year in Photos, Part 3 of 3, one of 45 photos. President Barack Obama hugs his wife Michelle, after she introduces him at a campaign event at the Village of East Davenport in Davenport, Iowa, on August 15, 2012. In November, this image was attached to a short message sent by Barack Obama’s Twitter account, after his re-election became certain, saying simply “Four more years.” The image quickly became the most re-tweeted photo in Twitter’s history. (Scout Tufankjian/Obama for America)

From 2012: The Year in Photos, Part 3 of 3, one of 45 photos. President Barack Obama hugs his wife Michelle, after she introduces him at a campaign event at the Village of East Davenport in Davenport, Iowa, on August 15, 2012. In November, this image was attached to a short message sent by Barack Obama’s Twitter account, after his re-election became certain, saying simply “Four more years.” The image quickly became the most re-tweeted photo in Twitter’s history. (Scout Tufankjian/Obama for America)

December 5, 2012
From 2012: The Year in Photos, Part 2 of 3, one of 45 photos. U.S. gymnast Gabrielle Douglas performs on the balance beam during the artistic gymnastics women’s individual all-around competition at the 2012 London Summer Olympics, on Thursday, August 2, 2012. (AP Photo/Gregory Bull)

From 2012: The Year in Photos, Part 2 of 3
, one of 45 photos. U.S. gymnast Gabrielle Douglas performs on the balance beam during the artistic gymnastics women’s individual all-around competition at the 2012 London Summer Olympics, on Thursday, August 2, 2012. (AP Photo/Gregory Bull)

December 4, 2012
From 2012: The Year in Photos, Part 1 of 3, one of 45 photos. The Costa Concordia, seen on January 14, 2012, after the cruise ship ran aground and keeled over off the Isola del Giglio. 32 passengers and crew members were killed after the Italian ship with some 4,200 people on board ran aground. The Costa Concordia was on a trip around the Mediterranean when it apparently hit a reef near the island of Giglio on Friday, only a few hours into its voyage, as passengers were sitting down for dinner. Captain Francesco Schettino, who reportedly abandoned the ship shortly after it sank, lost his job and still potentially faces manslaughter charges. (Filippo Monteforte/AFP/Getty Images)

From 2012: The Year in Photos, Part 1 of 3, one of 45 photos. The Costa Concordia, seen on January 14, 2012, after the cruise ship ran aground and keeled over off the Isola del Giglio. 32 passengers and crew members were killed after the Italian ship with some 4,200 people on board ran aground. The Costa Concordia was on a trip around the Mediterranean when it apparently hit a reef near the island of Giglio on Friday, only a few hours into its voyage, as passengers were sitting down for dinner. Captain Francesco Schettino, who reportedly abandoned the ship shortly after it sank, lost his job and still potentially faces manslaughter charges. (Filippo Monteforte/AFP/Getty Images)