Compiled 20:45 GMT
By KATHARINE Q. SEELYE and MICHAEL COOPER
The day after two explosions at the Boston Marathon killed three people and injured 176, no arrests had been made, and no one had claimed responsibility.
By JOHN ELIGON
Bill Richard, the father of the 8-year-old boy who was killed Monday, offered thanks to "our family and friends, those we know and those we have never met, for their thoughts and prayers."
By MARK LANDLER
President Obama labeled the Boston blasts a terrorist attack for the first time, but he said officials did not know whether it was the work of foreign or domestic groups or individuals.
By ELLEN BARRY
The anticorruption blogger Aleksei A. Navalny is trying to etch a lasting image in the public imagination before his trial on embezzlement charges begins Wednesday.
By SCOTT SHANE
A nonpartisan review concluded that the use of torture had "damaged the standing" of the United States and "potentially increased the danger to U.S. military personnel."
By THOMAS ERDBRINK
A 7.8-magnitude earthquake struck near Iran's border with Pakistan, and it was felt as far away as India and the Middle East.