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 23: Obama lifts ban on federal funding for international organizations that perform or provide information on abortions.
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. 3: Former Senate Majority Leader Tom Daschle, D-S.D., withdraws as Obama's nominee for secretary of health and human services.
Feb. 9: Obama holds first prime-time news conference, calling on Congress to enact his economic stimulus plan.
Feb. 12: Sen. Judd Gregg, R-N.H., withdraws as Obama's nominee for secretary of commerce.
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. 17: Obama signs the stimulus measure into law.
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. 22: Obama hosts governors in his first formal dinner at the White House.
Feb. 23: Obama holds a fiscal responsibility summit at the White House, signaling his intention to tackle health care, the budget and Social Security.
Feb. 24: Obama addresses a joint session of Congress for the first time, focusing on economic issues.
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.