A look at key events during the first 100 days of Barack Obama's presidency:

Jan. 22: Obama orders the closure of Guantanamo Bay prison within a year and declares that the United States will not engage in torture.

Jan. 27: Obama gives first formal television interview as president to Arab television station, telling Muslims, "Americans are not your enemy."

Jan. 29: Obama signs first bill into law, the Lilly Ledbetter Fair Pay Act, making it easier for workers to sue for pay discrimination.

Feb. 13: Congress completes action on a $787 billion economic stimulus package of tax cuts and new spending, intended to jolt the country out of the worst recession in 50 years.

Feb. 19: Obama makes his first visit to a foreign country as president, meeting with Canadian Prime Minister Stephen Harper during a seven-hour visit to Ottawa.

Feb. 26: Obama unveils a $3.6 trillion federal budget for 2010 and estimates that the federal deficit for 2009 will balloon to $1.75 trillion.

Feb. 27: Obama announces withdrawal of all American combat forces from Iraq by August 2010, but says the U.S. will leave tens of thousand support troops behind.

March 26: Obama holds "Open for Questions," the first virtual town hall meeting at the White House.

March 27: Obama announces comprehensive new strategy for Afghanistan and Pakistan, including the deployment of 4,000 additional military trainers to Afghanistan.

March 31: Obama travels to London, the first stop on an eight-day, six country tour of Europe and the Middle East.

April 1: Obama meets with Russian President Dmitry Medvedev and announces start of negotiations on new strategic arms-control treaty.

April 2: Obama attends the Group of 20 economic summit in London, where leaders agree to bail out developing countries, stimulate world trade and regulate financial firms more stringently.

April 4: Obama attends NATO summit in Strasbourg but gets commitment from allies to send up to 5,000 more military trainers and police to Afghanistan.

April 7: Obama pays a surprise visit to Iraq, meeting with U.S. troops and Iraqi leaders.

April 12: Obama authorizes a military rescue of an American sea captain taken hostage by pirates in the waters off Somalia. The rescue results in the deaths of three pirates and the capture of the fourth, and frees Capt. Richard Phillips.

April 13: The administration announces that Cuban-Americans will be permitted to make unlimited transfers of money and visits to relatives in Cuba.

April 14: The Obamas introduce their new puppy, Bo, in a photo session on the White House lawn.

April 16: Obama meets with Mexican President Felipe Calderon on his first trip to Mexico and Latin America. The leaders agree to cooperate on combating drug violence along the U.S.-Mexican border.

April 17: Obama releases memos from the Bush administration authorizing harsh interrogation techniques but says no CIA employees who followed the memos will be prosecuted.

April 17: Obama travels to Trinidad and Tobago for the 34-nation Summit of the Americas and declares that he "seeks a new beginning with Cuba."

April 18: At the summit, Obama shakes hands with Venezuela's Hugo Chavez, the leftist, anti-American leader who had called Bush a devil.

April 20: Obama holds the first formal Cabinet meeting of his administration, ordering department heads to slice spending by $100 million, a tiny fraction of the $3.6 trillion federal budget he proposed a month earlier.

April 21: Obama leaves the door open for prosecution of federal lawyers who wrote harsh interrogation memos during Bush administration and says if there's an investigation, it should be done by an independent commission.

April 23: Obama tells congressional leaders he will not support creation of an independent commission on the Bush administration's harsh interrogation techniques.

April 24: Obama promotes his idea for the government to stop backing private loans to college students and replace them with direct government loans.

April 25: Obama uses his radio address to announce a plan for federal workers to propose ways to improve their agencies' and departments' budgets.