Wisconsin Gov. Scott Walker speaks at the Western Conservative Summit, hosted by the Centennial Institute, Colorado Christian University's think tank, in Denver, last month. Walker is announcing a run for the White House, joining more than a dozen Republicans to enter the 2016 contest. Brennan Linsley/AP hide caption
Proposed federal rules would aim to minimize the use of antipsychotic drugs and increase training for nurses in dementia care. Jiri Hubatka/imageBroker/Corbis hide caption
Secretary of State John Kerry leaves his hotel on the way to Mass at St. Stephen's Cathedral in Vienna, Austria, on Sunday. Carlos Barria /AP hide caption
Greek Prime Minister Alexis Tsipras (front left) leaves after a meeting of eurozone heads of state Monday at the EU Council building in Brussels. The summit reached a tentative agreement with Greece for a bailout program that includes "serious reforms," removing an immediate threat that Greece could collapse financially and leave the euro. Francois Walschaerts/AP hide caption
Idle for more than 25 years, the comic strip Bloom County returned to life Monday. Berkeley Breathed/Facebook hide caption
A federal police Black Hawk helicopter flies over a house at the end of a tunnel through which drug lord Joaquin "El Chapo" Guzman could have escaped from Mexico's Altiplano prison. Yuri Cortez /AFP/Getty Images hide caption
Hands holding one week old baby boy. Leanne Temme/Getty Images hide caption
"Probably the most shocking thing to me was the number of people that die every day in the United States from a drug overdose. I knew there was a problem. I knew it was big. I didn't know it was 120 people a day," acting DEA Chief Chuck Rosenberg said in his first interview since taking over at the agency. Dennis Cook/AP hide caption
An early win for Wisconsin Gov. Scott Walker in Iowa could propel him far in the 2016 GOP presidential primaries. Rainier Ehrhardt/AP hide caption
The varicella zoster virus causes chickenpox in children, then lurks in the body for years and can cause painful shingles later in life. James Cavallini/Science Source hide caption
Satoru Iwata, seen here at a press conference in Tokyo in 2009, helped lead Nintendo back to ascendancy in the early 2000s. Toru Yamanaka/AFP/Getty Images hide caption
Malala Yousafzai celebrated her birthday and the opening of a new school with "brave and inspiring girls of Syria" in Lebanon on Sunday. WAEL HAMZEH/EPA /LANDOV hide caption
Novak Djokovic celebrates his win over Roger Federer in the men's singles final at Wimbledon. Dominic Lipinski/PA Photos/Landov hide caption
Secretary of State John Kerry walks on the terrace of Palais Coburg, the venue for nuclear talks in Vienna, on Sunday. Leohard Foeger/Reuters/Landov hide caption
Finnish Finance Minister Alexander Stubb (right) speaks with Greek Finance Minister Euclid Tsakalotos during a round table meeting of eurogroup finance ministers in Brussels on Sunday. Virginia Mayo/AP hide caption
Joaquin "El Chapo" Guzman is escorted to a helicopter in handcuffs by Mexican navy marines at a navy hanger in Mexico City after his capture last year. Mexico's security now say Guzman has escaped from a maximum security prison for the second time. Eduardo Verdugo/AP hide caption
"I know that you may have moments in your lives when you're filled with doubts, or you feel weighed down by history ... But when you start to feel that way, I want you all to remember one simple but powerful truth — that every single one of your lives is precious and sacred, and each of you was put on this earth for a reason," Michelle Obama said addressing the gathering. Jacquelyn Martin/AP hide caption
Chloe Judnic of the River Belles. Courtesy of Carol "Miss Jewel" Sheldon hide caption
Men line up at a takeaway food stand in the Saudi port of Jeddah in the early hours of August 26, 2011. Practicing Muslims eat their suhoor meal before dawn during the holy fasting month of Ramadan. Amer Hilabi/AFP/Getty Images hide caption
Suspected members of El Salvador's 18th Street gang stand handcuffed in pairs at a police station in Panchimalco, near San Salvador. The government has launched well-publicized raids, roundups and a crackdown on gang leaders, locking them away in maximum security prisons. Manu Brabo/AP hide caption
Frederik de Pue whisks mayonnaise, instead of raw eggs, into his bearnaise sauce. Ted Robbins/NPR hide caption