US First Lady Michelle Obama visits a center for displaced children in Port-au-Prince on April 13. Mrs. Obama made a surprise visit to the devastated Haitian capital before continuing to Mexico. Brennan Linsley/AP
First Lady Michelle Obama (2nd. r.) walks with Haitian President Rene Preval (c.) at the Presidential Palace in Port-au-Prince, Haiti, on April 13. Brennan Linsley/AP
First Lady Michelle Obama greets children at a school in Port-au-Prince on April 13 during her surprise visit to Haiti. Brennan Linsely/AP
First Ladies Michelle Obama (c.) and Elisabeth Debrosse (r.), wife of Haitian President Preval, and Jill Biden (l.), wife of Vice President Joe Biden, paint with children at a local children's welfare project in Port-au-Prince, Haiti, on April 13. Eduardo Munoz/Reuters
A US Navy helicopter carrying first Lady Michelle Obama and Jill Biden lands at the presidential palace in Port-au-Prince, Haiti, on April 13. Obama and Biden made a surprise visit to Haiti on Tuesday. Ramon Espinosa/AP
Jill Biden (l.) and First Lady Michelle Obama walk with Haitian President Rene Preval (c.) at the Presidential Palace in Port-au-Prince, Haiti on April 13. Brennan Linsley/AP
First Lady Michelle Obama shakes hands with UN and NGO workers during a visit to the United Nations base in Port-au-Prince, Haiti on April 13 while on a one-day surprise visit to the earthquake-devastated capital. Brennan Linsley/AP
Michelle Obama steps off the presidential airplane upon her arrival in Mexico City on April 13. Obama is on her first solo visit to the nation and will stay for three days.
First Lady Michelle Obama smiles as she is greeted by children upon her arrival at Benito Juarez International Airport in Mexico City on April 13.
Counselor Maria Teresa Mercado, Deputy Director of the Office of Protocol of Mexico's Foreign Relations Secretary, and US Ambassador to Mexico Carlos Pascual welcome Michelle Obama upon her arrival in Mexico City.
First Lady Michelle Obama waves to the media after arriving in Mexico City on April 13.
First Lady Michelle Obama (l.) and Mexican First Lady Margarita Zavala visit the National Museum of Anthropology in Mexico City on April 14. Eduardo Verdugo/AP
First Lady Michelle Obama and Mexican First Lady Margarita Zavala acknowledge members of a children's orchestra during a visit to the National Museum of Anthropology in Mexico City on April 14. Eduardo Verdugo/AP
At the Siete de Enero school in Mexico City on April 14, First Lady Michelle Obama greets children during her visit to Mexico. Eliana Aponte/Reuters
First Lady Michelle Obama greets school children at the Siete de Enero school in Mexico City on April 14. Dario Lopez-Mills/AP
While on her first solo trip as first lady to Mexico, Michelle Obama waves during a visit to the National Anthropology Museum on April 14. Dario Lopez-Mills/AP
Michelle Obama waves to cheering school children in Mexico City on April 14. Dario Lopez-Mills/AP
Mexican First Lady Margarita Zavala (l.) and First Lady Michelle Obama attend a dinner in Mexico City on April 14. Obama pressed for better education for children on Wednesday in her first solo trip abroad to Mexico. Mexico Presidency/Reuters
Airborne lasers produced a detailed map of the lost city of Mahendraparvata, including highways and previously undiscovered temples, hidden beneath dense vegetation in Cambodia.
Airborne laser technology has uncovered a network of roadways and canals, illustrating a bustling ancient city linking Cambodia's famed Angkor Wat temples complex.
/Photo-Galleries/Photos-of-the-Day/2013/Photos-of-the-day-06-17
/Photo-Galleries/In-Pictures/Nelson-Mandela-His-life-and-legacy
/Photo-Galleries/In-Pictures/Turkey-s-discontent
/Photo-Galleries/In-Pictures/Duchess-Kate-s-royal-baby-bump
/Photo-Galleries/Photos-of-the-Day/2013/Photos-of-the-Day-06-16
/Photo-Galleries/Photos-of-the-Day/2013/Photos-of-the-Day-0615
/Photo-Galleries/Photos-of-the-Day/2013/Photos-of-the-day-06-14
/Photo-Galleries/In-Pictures/Ireland-forever-images-of-the-emerald-isle
/Photo-Galleries/In-Pictures/Weather-extremes-2013
/Photo-Galleries/Photos-of-the-Day/2013/Photos-of-the-day-06-13
/Photo-Galleries/In-Pictures/Children-s-labors
/Photo-Galleries/In-Pictures/Wildfires-2013