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Federal Reserve chairman Ben Bernanke told Congress Wednesday that the central bank is not ready to scale back on economic stimulus. But he suggested the Fed may start to pare back bond purchases if the economy picks up momentum. Stocks fell following Bernanke's remarks.

Also: Amazon to begin publishing fan fiction; Paul Ryan and Elizabeth Warren are writing books; Keith Richards' exorbitant library fines.

An 80-year-old Japanese mountain climber has become the oldest person to reach the summit. But that record may not last. His 81-year-old Nepalese rival plans to make the ascent again next week.

On Wednesday, Lois Lerner, the IRS official overseeing the tax-exempt organizations office, refused to testify during a hearing on Capitol Hill, and was attacked by some Republicans on the House committee. Her brief appearance was the beginning of a five-hour session marked by angry outbursts and allegations of political motives.

The man, Ibragim Todashev, had known one of the suspects in the Boston Marathon bombings. Agents were apparently interviewing him overnight when things turned violent.

A Japanese mountaineer has become the oldest person to conquer Mount Everest, as Yuichiro Miura, 80, reached the peak Thursday morning. The feat marks Miura's third time atop Mount Everest. As in 2008, Miura's accomplishment is in danger of being surpassed by rival climber Min Bahadur Sherchan, 81.

There was more of a decline than economists expected, but the weekly pace hasn't really changed much since late 2011.

A British soldier was hacked to death on a busy south London street Wednesday. Witnesses say the two attackers claimed to be acting in revenge for the deaths of Muslims. Authorities are praising the heroism of women who confronted the attackers.

A 3-D printer is being credited with helping to save an Ohio baby's life, after doctors "printed" a tube to support a weak airway that caused him to stop breathing. The innovative procedure has allowed Kaiba Gionfriddo, of Youngstown, Ohio, to stay off a ventilator for more than a year.

Armando Christian Perez — better known as Pitbull or Mr. Worldwide — has sold five million albums and had No. 1 hits in more than 15 countries. He tells NPR's Michel Martin about using music as an escape and playing a well-dressed toad in the animated film Epic.