This gallery comprises iconic photographs from different parts of the world compiled by Reuters.
Shinmoedake volcano erupts between Miyazaki and Kagoshima prefectures, in this aerial view taken in Japan; January 28, 2011.
A protester stands in front of a burning barricade during a demonstration in Cairo January 28, 2011.
A view of a street after violent clashes between Libyan interim government forces and loyalists of Muammar Gaddafi in Sirte October 18, 2011.
Blood-stained shoes worn by Linda Lopez as she evacuated from the 97th Floor of Tower 2 on September 11, 2001 are displayed before becoming a part of the National September 11 Memorial & Museum in New York August 22, 2011.
Mount Etna spews lava on the island of Sicily October 23, 2011. Mount Etna is Europe's tallest and most active volcano.
Kalyani Das, 60, ties her husband Pachugopal, 65, to the metal bars of a train window using a chain and padlocks while travelling from Mallickpur village where they live to Kolkata where she works September 19, 2011. Kalyani Das says her husband suffers from a mental disorder, and she chains her husband to prevent him from abusing her and running away while she works. Das said her husband's condition started about seven years ago because of family problems. Kalyani, who earns 50 Indian Rupees a day ($1.05) working
The India-Pakistan border appears as an orange line in this photograph taken by the Expedition 28 crew on the International Space Station (ISS) on August 21, 2011 and released September 4, 2011. The fence between the two countries is floodlit for surveillance purposes. Srinagar (L), Islamabad (bottom C), Lahore (centre near the border line) and Delhi (top C) can be seen as brighter spots.
Containers on the stern deck of the 47,230 tonne Liberian-flagged Rena hang precariously, about 12 nautical miles (22 km) from Tauranga, on the east coast of New Zealand's North Island October 20, 2011. The recovery of fuel oil from a stricken container ship grounded off New Zealand resumed on Thursday as salvage teams worked to minimize the damage in the country's worst environmental disaster in decades.
A fisherman arranges a net as his wife paddles their boat in the waters of the Periyar river on the outskirts of the southern Indian city of Kochi January 5, 2011.
The race car of driver Will Power (L) goes airborne during the IZOD IndyCar World Championship race at the Las Vegas Motor Speedway in Las Vegas, Nevada October 16, 2011. The motor racing world was left reeling on Monday from the death of time-two Indianapolis 500 champion Dan Wheldon while the search for answers into what triggered the horrific crash began. Wheldon's death in the IndyCar finale at Las Vegas Speedway on Sunday left fans stunned and plunged series officials into crisis management mode as the season-
The Tribute in Lights is illuminated next to One World Trade Center during events marking the 10th anniversary of the 9/11 attacks on the World Trade Center in New York, September 11, 2011.
Roshan Bliss, who says he has a debt of $50,000 in school loans, attends an Occupy Denver demonstration in Denver, Colorado November 17, 2011 to celebrate the two-month anniversary of Occupy Wall Street.