President Obama speaks at Ellicott Dredges in Baltimore on May 17. The trip followed a visit by the company's president to Capitol Hill to testify in support of the Keystone XL pipeline. The White House says Obama's speech had nothing to do with Keystone, but environmental groups have been frustrated with his stance on the issue.
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And I'm David Greene.
For months now, the Obama administration has promised to reveal more about America's secret drone program, and today could be the day. The president will speak this afternoon at the National Defense University, and he's planning to discuss America's fight against terrorism. He is expected to address everything from drones to the prison at Guantanamo Bay.
Credit Ian Harrowell, Christine Austin, Manish Arora / Harvard School of Public Health
This model of a molar shows color-coded barium banding patterns that reveal weaning age.
Credit Alyson Hurt, Adam Cole / NPR / Christine Austin / Westmead Centre for Oral Health
Top: Lines on a 100,000-year-old Neanderthal tooth mark the passage of time. Bottom: The distribution of barium shows dietary transition: low barium before birth (1), high barium during breast-feeding (2) and falling barium as the Neanderthal transitions to a mixed diet (3).
Our closest relatives, chimpanzees and gorillas, breast-feed their offspring for several years. Some baby orangutans nurse until they are 7 years old.
But modern humans wean much earlier. In preindustrial societies, babies stop nursing after about two years. Which raises the question: How did we get that way? When did we make the evolutionary shift from apelike parenting to the short breast-feeding period of humans?
Public opinion about the scandals plaguing the Obama administration is decidedly mixed.
Republicans believe that the trio of controversies — concerning Benghazi, the IRS, and the Justice Department snooping on media phone records — are evidence enough that President Obama is either running a government motivated by partisan politics, or is badly out of touch.
Democrats, however, are proving to be much more forgiving.
For the first time, the U.S. government has acknowledged killing four American citizens in lethal drone strikes far outside traditional battlefields, confirming information that had been widely known but has only recently been unclassified under orders of the president.
It's time now for your letters, and we got many about our coverage of the tornado that devastated Moore, Oklahoma. Several were praise for our story yesterday about survivors who lost most of their possessions but considered themselves lucky.
CHRISTINE PARRISH: They were digging her out while we were looking through our stuff. And we thought they were looking for their dogs, and it was her. And they found her, and she was passed.
There has been an unexpected turn in the Boston Marathon bombing case. A man who was thought to have ties with one of the bombing suspects was shot dead early this morning by authorities in Florida. He allegedly tried to attack an FBI agent who was interviewing him. NPR's Dina Temple-Raston has been following the story and is here with the latest. Hi, Dina.