In Pictures: Michelle Obama in Haiti and Mexico
In Pictures: Rescue teams to Haiti
In Pictures: American troops in Haiti
In Pictures: Staff shots: Scenes from the Haiti earthquake
In Pictures: Haiti earthquake
In Pictures: Haiti: Art after the earthquake
Former Alaska Gov. Sarah Palin (c.) visits a cholera treatment center run by the Rev. Franklin Graham's relief organization, Samaritan's Purse, in Cabaret, Haiti, on Dec. 11. Ms. Palin arrived in Haiti as part of a brief humanitarian mission in the impoverished nation struggling to overcome postelection violence and a cholera epidemic. Ramon Espinosa/AP
Sarah Palin (c.) is interviewed by Fox News Channel journalist Greta Van Susteren during her visit to a cholera treatment center run by the Rev. Franklin Graham's relief organization, Samaritan's Purse, in Cabaret, Haiti, on Dec. 11. Ramon Espinosa/AP
Sarah Palin (c.) talks to the press as the Rev. Franklin Graham, who runs the aid organization Samaritan's Purse, looks on at the Titanyan Global Outreach Samaritan’s Purse compound in Cabaret, Haiti, on Dec. 12. Guillermo Arias/AP
From left, Philip Seymour Hoffman, Gerard Butler, Susan Sarandon, and Adrien Brody attend the Artists For Peace And Justice's "Let's Build A School For Haiti" fundraising dinner in New York City on Nov. 5. Billy Farrell/Newscom
Wyclef Jean, the Haitian musician, founded Yéle Haiti in 2005, to help the country with education, health, the environment, and community development. After the earthquake hit Haiti, Jean asked people to raise $5 million for Yéle Haiti to help with earthquake relief, and also participated in 'We Are The World - 25 Years for Haiti,' and Hope for Haiti Now, a telethon to raise money for earthquake victims. Here, Jean is seen arriving at the airport in Port-au-Prince, Haiti, on Jan. 13, the day after the 7.0-magnitude earthquake hit the nation. Lynne Sladky/AP
Colombian singer Shakira (c.) visits the Petionville Golf Club's makeshift camp for Haiti earthquake victims on April 11. Shakira's 'Pies Descalzos' foundation will finance the construction of a new school in Port-au-Prince. Ramon Espinosa/AP
George Clooney organized the Hope for Haiti Now telethon to raise money for victims of the Haiti earthquake. The benefit concert took place in New York, Los Angeles, London, and Haiti. Celebrities such as Julia Roberts, Ben Affleck, and Colin Farrell (seen in background) volunteered to man the phones at the telethon. Here, Clooney speaks at the Hope For Haiti Now telethon on Jan. 22 in Los Angeles. Jeff Kravitz/UPI/Newscom
The Edge, Bono, Jay-Z, and Rihanna perform for the Hope for Haiti Now benefit concert at The Hospital Club in London, England, on Jan. 22. Dave M. Bennet/UPI/Newscom
Matt Damon gives a sack of rice to Haitian musician Wyclef Jean during a food distribution operation for flood victims in Cabaret, Haiti, in Sept. 2008. After the earthquake in early January 2010, Damon's OneXOne Foundation, which has been doing work in Haiti since 2006, upped their efforts, sending planeloads of supplies to help earthquake victims. Ariana Cubillos/AP/FILE
Musicians Dave Matthews and Neil Young perform during the Hope for Haiti Now benefit telethon on Jan. 22 in Los Angeles, Calif. Jeff Kravitz/UPI/Newscom
Through his Livestrong Foundation, Lance Armstrong donated $250,000 to relief efforts in Haiti following the earthquake. Livestrong gave the money to Partners in Health, led by Paul Farmer, and Doctors Without Borders, two prominent organizations involved in the region. Business Wire/FILE
Acting stars Jack Nicholson and Reese Witherspoon were among many A-List celebrities that attended and volunteered at the Hope for Haiti Now telethon and benefit concert. Jeff Kravitz/UPI/Newscom
Fireworks explode during the singing of the national anthem during the pregame ceremonies on Opening Night of Major League Baseball in Boston, Mass., April 4, where the Boston Red Sox faced the New York Yankees. After the earthquake in Haiti, MLB pledged $1 million dollars to start, and then specific clubs made donations, including the Yankees, who gave $500,000 and the Toronto Blue Jays, who donated $250,000. Adam Hunger/Reuters
Actor Leonardo DiCaprio gave $1 million to help survivors of the Haiti earthquake through his Leonardo DiCaprio Foundation. Here, DiCaprio is seen promoting his film 'Shutter Island' in Tokyo, Japan, on March 11. Koji Sasahara/AP
Brazilian model Gisele Bundchen poses for photographers during a photocall to present the 'Ipanema-Gisele Bundchen' sandals collection in Paris on April 8. Ms. Bundchen donated $1.5 million to The Red Cross to help with the rescue and relief efforts in Haiti after the earthquake. Benoit Tessier/Reuters
This year's Academy Award winner for Best Actress, Sandra Bullock, is among the list of celebrities who gave $1 million to Haiti in the aftermath of the 7.0-magnitude earthquake. Bullock is seen here with her Oscar in Hollywood on March 7. Lucy Nicholson/Reuters
Singers including Celine Dion, Justin Bieber, Usher, Katharine McPhee, will.i.am, Toni Braxton, Barbara Streisand, LL Cool J, Harry Connick Jr., Natalie Cole, and Wyclef Jean, among others, perform a remake of the traditional recording 'We Are the World,' at a recording session held at Jim Henson Studios on Feb. 1, in Los Angeles, Calif. Proceeds from each download of the song go to the We Are The World Foundation, to help with the relief efforts in Haiti. Kevin Mazur/WATW
Singer Beyonce performed a duet with the Coldplay's Chris Martin at the Hope for Haiti Now on Jan. 22 in London. The Council of Fashion Designers of America named Beyonce as the official face of their 'Fashion For Haiti' T-shirt. The organization donates all proceeds from the shirt to the Clinton Bush Haiti Fund. MJ Kim/Hope for Haiti Now/AP
Along with Taylor Swift, Ashley Judd, a huge Kentucky fan, helped the University of Kentucky, to raise $1million in a 'Hoops for Haiti,' telethon. Judd is seen here cheering on the Kentucky men's basketball team in the semi-final game against Tennessee in the Southeastern Conference Tournament at Bridgestone Arena in Nashville, Tenn., on March 13. Mark Cornelison/Lexington Herald-Leader/MCT/Newscom
Singer Justin Timberlake takes phone calls for the Hope For Haiti Now telethon and benefit on Jan. 22 in Los Angeles. Timberlake sang Leonard Cohen's 'Hallelujah' for the telethon. MTV Hope For Haiti Now/AP
US actress Maria Bello (l.) helps American nurse Orla Walsh as they set up a women's clinic at a makeshift camp for earthquake survivors at the Petionville Golf Club in Port-au-Prince, Haiti, on March 14. Ms. Bello is doing aid work in Haiti through the Jenkins-Penn Haiti Relief Operation, led by fellow actor Sean Penn. Andres Leighton/AP
Celebrities such as Adam Sandler, Billy Crystal, Robert De Niro, Leonardo DiCaprio, and Ellen Barkin work the phone bank at the Hope For Haiti Now telethon and benefit in Los Angeles, Calif., on Jan. 22. Mark Davis/Hope For Haiti Now/AP
Angelina Jolie and Brad Pitt donated $1 million to Doctors Without Borders to help with the Haiti earthquake relief. Here, the couple visits refugees in the eastern Bosnian town of Visegrad on April 5. Jolie is also a UNHCR goodwill ambassador. Amel Emric/AP
Actor Sean Penn carries the belongings of a displaced earthquake survivor as people are relocated from the Petionville Golf Club to a new camp, Corail Cesselesse, in Port-au-Prince, Haiti, on April 10. Haiti's government is beginning to relocate thousands of people in a multiagency effort to move people to higher ground before the rainy season. Penn got to Haiti a week after the earthquake and started a a nongovernmental organization there, with nearly 40,000 people in the camp he started. Ramon Espinosa/AP
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The British prime minister has been under fire for his plan to try to renegotiate Britain's role in the EU before putting it to a referendum. But Obama voiced support for the plan on Monday.
It's been a hard few days for David Cameron.
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