Roger Federer won't be competing at Rio next month — or anywhere else, for the rest of the year.

In an announcement on Facebook, he says he needs "more extensive rehabilitation" after knee surgery earlier this year.

Federer, currently ranked No. 3 in the world, won medals at the last two Olympics — a gold in doubles at Beijing in 2008, and a silver in singles at London in 2012.

The baristas have spoken, and Starbucks is listening: The company says it's loosening its dress code for in-store employees. Yes, the green aprons remain, but you may begin noticing more personal flair underneath.

A company announcement invites baristas "to shine as individuals while continuing to present a clean, neat and professional appearance."

In her speech Monday night at the Democratic National Convention in Philadelphia, Michelle Obama said she wakes up "every morning in a house that was built by slaves." She spoke about the feeling of watching her daughters, "two beautiful, intelligent, black young women, playing with their dogs on the White House lawn."

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After the July 14 terrorist attack in Nice, the French interior minister called on "all willing French patriots" to help defend the country by volunteering for the military's reserves.

Two sisters, Majda and Amina Belaroui, French Muslims of Moroccan heritage, heeded the call in the wake of the Bastille Day attack, when a Tunisian truck driver mowed down crowds of spectators, killing 84 and wounding hundreds.

A district judge in Texas has dismissed the last remaining criminal charges against two activists who covertly recorded videos of themselves attempting to buy fetal tissue from Planned Parenthood.

David Daleiden and Sandra Merritt used fake IDs when they approached the organization. They were indicted for tampering with government records, a felony charge. Those charges have now been dismissed on technical grounds.

An attorney for the pair called it "a huge win for First Amendment rights," NPR's Jennifer Ludden reports.

Two studies released at an international Alzheimer's meeting Tuesday suggest doctors may eventually be able to screen people for this form of dementia by testing the ability to identify familiar odors, like smoke, coffee and raspberry.

In both studies, people who were in their 60s and older took a standard odor detection test. And in both cases, those who did poorly on the test were more likely to already have — or go on to develop — problems with memory and thinking.

The prime minister of Australia said he is "shocked and appalled" after seeing footage of children being hooded, shackled, stripped and held on the floor by prison guards at a youth detention facility in the Northern Territory.

Charles Kinsey, a Florida health worker, was swept into the national debate about police and African-Americans after video of police shooting him went viral.

If Hillary Clinton wins the White House in November, she would be the first female president of the United States.

There would be a few other firsts in the family that night as well: Bill Clinton would be the first man married to a U.S. president. He would also become the first former president to become the first spouse.

Tuesday night, Bill Clinton addresses the Democratic National Convention in Philadelphia to make the case for his wife. It will be his 10th time addressing the DNC.

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