Apple's newest iPhone went on sale in China Friday but soon sold out in the company's retail stores — and the disappointed crowds and the fights that started outside led Apple to restrict future sales to online purchases, at least for now. Apple fans were angry at the limited supply, and blamed the company — and scalpers.

Standard and Poor's has downgraded the credit ratings of nine eurozone countries, including France. S&P has had 15 eurozone countries on a "negative credit watch" for weeks, so the announcement Friday wasn't much of a surprise. Analysts, though, are concerned about possible ripple effects. Audie Cornish talks with NPR's John Ydstie for more.

The United States announced Friday that it will exchange ambassadors with Myanmar, also known as Burma, partly in response to the release of hundreds of political prisoners there. This is the latest development in what appears to be a dramatic turnaround for the repressive government in that Southeast Asian nation. President Obama calls the prisoner release "a substantial step forward for democratic reform." Currently, the U.S. Embassy is headed by a charge d'affaires rather than an ambassador.

The pro-Gingrich superPAC Winning Our Future has distributed a 29-minute film about former Massachusetts Gov. Mitt Romney's time at the private-equity firm Bain Capital. Melissa Block talks with Bill Adair of the fact-checking website PolitiFact.com about the film, called King of Bain: When Mitt Romney Came to Town.

Young Russians are computer savvy, though until recently they had not turned to social media to challenge the government. Now, online activists are raising money and planning the next big protest against Russia's leaders.