When crossing from Uganda into Congo at the shabby border town of Bunagana, I encountered a broadly smiling man in a black leather jacket named Hamid Kashaisha.
He asked if I wanted to see the gorillas. I replied that it's guerrillas — with guns, that is — that I wanted to see: the M23 rebels who, for the past two months, had occupied a piece of real estate in eastern Congo larger than Delaware.
Every election season Republicans and Democrats tried to rally their base and to go after undecided voters. They're increasingly using the Internet in Get Out The Vote efforts.
NPR correspondent Shankar Vedantam, who reports on social science research, joins me now to talk about how Facebook could become a potent weapon in going after the biggest untapped voting bloc in the nation. Shankar, welcome.
SHANKAR VEDANTAM, BYLINE: Hi, Melissa.
BLOCK: Who are these mystery voters, this untapped voting bloc that we mentioned?
From NPR News, this is ALL THINGS CONSIDERED. I'm Audie Cornish.
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And I'm Melissa Block.
In this hour of the program, we remember Christopher Stevens, the first sitting U.S. ambassador killed in more than 30 years. And we'll explore how the attacks in Libya and Egypt have become fodder for political debate.