OBAMA-IRAN

WASHINGTON — For President Barack Obama, the historic nuclear accord with Iran is a validation of an arduous, politically fraught diplomatic gamble. 

PRESIDENTIAL RACE-IRAN

WASHINGTON — Democratic presidential front-runner Hillary Rodham Clinton embraces a landmark nuclear deal with Iran, calling it the most effective path for the U.S. to prevent Iran from acquiring nuclear weapons. But she warns it would need strict enforcement, underscoring the tension between President Barack Obama's foreign policy legacy and the White House aspirations of his first secretary of state. 

PRESIDENTIAL RACE-POLITICAL MONEY

WASHINGTON —The 2016 presidential race has already collected roughly $377 million in donor money in the 16 weeks since the first major candidate entered the contest, an Associated Press review shows. 

PLUTO

CAPE CANAVERAL, Florida — NASA's New Horizons spacecraft gets humanity's first up-close look at Pluto, sending word of its triumph across 3 billion miles (4.8 billion kilometers) to scientists waiting breathlessly back home. 

MEXICO-DRUG LORD ESCAPE-TUNNEL

ALMOLOYA, Mexico — A visit to the exit of Joaquin "El Chapo" Guzman's escape tunnel in an unfinished barn provides a look at the last few yards that Mexico's most powerful drug lord traversed during his second escape from a maximum-security prison.