Jayne Rowse (left) and April DeBoer with their four children, Jacob (from left), Rylee, Nolan and Ryanne at a news conference in March. Valerie Macon/Getty Images hide caption

Saudi Arabia's army fires artillery shells toward Houthi rebels along the Saudi border with Yemen on April 15. Outside Saudi Arabia, many are critical of the military campaign and question whether it will succeed, but it is popular inside the kingdom. STR/Reuters/Landov hide caption

Geologists Dave Tucker (left) and Pete Stelling at the Mount Baker hot springs in Washington's Cascade Mountains. The springs are within the large tract of federal land that could soon be open for geothermal development. Ashley Ahearn/KUOW hide caption

Intel Corp. co-founder Gordon Moore holds up a silicon wafer at Intel headquarters in Santa Clara, Calif., in 2005. Moore's prediction 50 years earlier, called Moore's Law, has been the basis for the digital revolution. Paul Sakuma/AP hide caption

The U.S. Preventive Services Task Force recommends mammograms every other year, while the American Cancer Society endorses annual scans. Kari Lehr/Image Zoo/Corbis hide caption

Alabama Shakes' new album, Sound & Color, is powered by more than just the vocals of Brittany Howard. Brantley Gutierrez/Courtesy of the artist hide caption