Here's a look at what you need to know about WikiLeaks and the trial of U.S. Army Pfc. Bradley Manning.
Facts: WikiLeaks is an organization that facilitates the anonymous leaking of secret information through its website.
It was founded in 2006 by Julian Assange, activist, computer programmer and hacker.
Timeline: December 2007 - WikiLeaks posts the U.S. Army manual for soldiers dealing with prisoners at Camp Delta, Guantanamo Bay.
March 2008 - WikiLeaks posts internal documents from the Church of Scientology.
September 2008 - WikiLeaks posts emails from Sarah Palin's Yahoo e-mail account.
November 2008 - WikiLeaks posts a list of names and addresses of people it claims belong to the far-right British National Party.
November 2009 - WikiLeaks posts about 500,000 pager messages sent in New York City on the day of the September 11, 2001 attacks. Most are from ordinary people.
April 5, 2010 - A classified military video is posted by WikiLeaks. It shows a U.S. Apache helicopter firing on and killing two journalists and a number of Iraqi civilians in 2007. The military claimed that the helicopter crew believed the targets were armed insurgents, not civilians.
May 2010 - The U.S. military detains Pfc. Bradley Manning for allegedly leaking U.S. combat video, including the U.S. helicopter gunship attack posted on WikiLeaks, and classified State Department records. Manning was turned in by Adrian Lamo, a former hacker, who Manning confided in about leaking the classified records.
July 6, 2010 - The U.S. military announces it has charged Manning with violating army regulations by transferring classified information to a personal computer and adding unauthorized software to a classified computer system and of violating federal laws of governing the handling of classified information.
July 25, 2010 - WikiLeaks posts more than 90,000 classified documents relating to the Afghanistan war in what has been called the biggest leak since the Pentagon Papers during the Vietnam War. The documents are divided into more than 100 categories and touch on everything from the hunt for Osama bin Laden to Afghan civilian deaths resulting from U.S. military actions.
October 22, 2010 - WikiLeaks publishes nearly 400,000 classified military documents from the Iraq war, providing a new picture of how many Iraqi civilians have been killed, the role that Iran has played in supporting Iraqi militants and many accounts of abuse by Iraqi's army and police.
November 28, 2010 - WikiLeaks begins publishing approximately 250,000 leaked State Department cables dating back to 1966. The site says the documents will be released "in stages over the next few months."
November 28, 2010 - The WikiLeaks website suffers an attack designed to make it unavailable to users. A Twitter user who calls himself Jester claims responsibility for the attack.
November 30, 2010 - WikiLeaks comes under another electronic attack designed to make it unavailable to users, according to a Twitter post from WikiLeaks.
December 1, 2010 - Amazon removes WikiLeaks from its servers.
April 24, 2011 - Nearly 800 classified U.S. military documents obtained by WikiLeaks reveal details about the alleged terrorist activities of al Qaeda operatives captured and housed at the U.S. Navy's detention facility in Guantanamo Bay, Cuba.
September 2, 2011 - WikiLeaks releases its archive of more than 250,000 unredacted U.S. diplomatic cables.
October 24, 2011 - WikiLeaks announces that it is temporarily halting publication to "aggressively fundraise." Assange states that a financial blockade by Bank of America, VISA, MasterCard, PayPal and Western Union has cut off 95% of WikiLeaks' revenue.