On a recent Monday morning in Washington, D.C., a group of 3-year-old preschoolers bumbled their way into a circle, more or less, on the rug of their classroom. It was time to read.

The children sat cross-legged as their teacher, Mary-Lynn Goldstein, held high a book, Don't Let the Pigeon Drive the Bus. There was a short conversation about pigeons, then, for reasons that weren't entirely clear, cows; and then Goldstein began to read. She read as most teachers read, occasionally stopping to ask a question, point out a picture or make a comment about the story.

Facebook's stock fell $3.07 to end the day at $28.84. That's first time it's fallen below $30 since the stock went public.

That price is also 24 percent below its opening price of $38.

The Wall Street Journal that the drop had to do with negative sentiment about the stock, as well as the fact that today traders were able to trade on derivatives.

The Facebook stock saw so much trading, the Journal reports, that it triggered Nasdaq's short sale circuit-breaker.

Congress is considering legislation allowing the government to search through Internet traffic for early warnings of cyberattacks. The bills are controversial — worries about government surveillance have led to protests online.

The government does have a tool that could calm fears about this kind of legislation — it just doesn't use it.

Transcript

NEAL CONAN, HOST:

It's Tuesday and time to read from your comments. Cathy May(ph) in Bigelow, Arkansas heard our conversation about possible compensation for organ donors and wrote: I'm donating a kidney to a friend this coming August. While I don't care to be paid for donating, I would love to be reimbursed from my loss of salary while recovering from the process. It's a great honor to help another person, but it comes at a cost for me.

At the moment the polls close in Texas Tuesday evening, most media outlets and very likely even the Mitt Romney campaign will declare that he has secured enough delegates to win the Republican nomination for president.

For what it's worth, there are two problems with that statement. First, as a practical matter, Romney actually won the Republican nomination when the other candidates competing for delegates in the primaries and caucuses stopped doing so. That was weeks ago.

One of the day's most-discussed stories has to be The New York Times' report headlined "Secret 'Kill List' Proves A Test Of Obama's Principles And Will."

It's a long, detailed look at how the president has "placed himself at the helm of a top secret 'nominations' process to designate terrorists for kill or capture, of which the capture part has become largely theoretical."