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Copyright 2016 NPR. To see more, visit NPR.

Copyright 2016 NPR. To see more, visit NPR.

Copyright 2016 NPR. To see more, visit NPR.

The American Cheese Society will begin proctoring its next Certified Cheese Professional Exam in Des Moines, Iowa, on Wednesday, during the group's annual conference. The rigorous test is only in its fifth year, but nearly 600 people have passed it already. Industry experts say the exam is necessary because of the evolving standards in the growing American cheese business.

Stockholders in Virgin America have approved the acquisition of their airline by Alaska Airlines. The chairman of Virgin America announced the voting results at a brief shareholders meeting Tuesday.

Donald Trump so far has stayed away from the Democratic National Convention in Philadelphia - but he's made his presence known on the campaign trail this week. The turmoil at the DNC convention has been constant theme of Trump's speeches as he and his running mate travel the country, campaigning and fundraising.

Roger Federer won't be competing at the Olympics in 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 the No. 3 ranked men's tennis player 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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