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Ellie (right) is a computer simulation designed to engage real people, like the woman on the left, in meaningful conversation and take their measure. The computer system looks for subtle patterns in body language and vocal inflections that might be clues to underlying depression or other emotional distress.

If Your Shrink Is A Bot, How Do You Respond?

A computer-simulated woman named Ellie is designed to talk to people who are struggling emotionally and take their measure — 30 times per second. Researchers hope their technology, which reads a person's body language and inflections, will yield diagnostic clues for clinical therapists.

Opponents of same-sex marriage participate in the March for Marriage in Washington, D.C., on March 26, as the Supreme Court hears arguments on California's Proposition 8 ban on same-sex marriage.

Bans Of Same-Sex Marriage Can Take A Psychological Toll

When several states passed laws banning same-sex marriages, researchers found that the mental health of gay residents seemed to suffer. Conversely, stress-related disorders dropped after the legalization of gay marriage in one state. Researchers say negative media portrayals and loss of safety were contributing factors.

Also: the two FBI agents killed in a training accident were members of an elite team; severe weather continues across the nation's midsection; car bombs kill dozens in Iraq; and the Powerball winner is still a mystery.

VIDEO: A Time-Lapse Of The Tornado In Oklahoma

The National Weather Service says it was at least an EF-4 tornado with winds in excess of 166 mph.

David Rainey, a former BP vice president during the Deepwater Horizon oil rig explosion, leaves federal court after being arraigned on obstruction of a federal investigation in New Orleans on Nov. 28, 2012. A federal judge Monday dismissed the charge that Rainey obstructed a congressional investigation into the 2010 spill.

Key Charge Against Ex-BP Official In Spill Case Dismissed

A federal judge ruled that prosecutors failed to prove the executive knew about a pending congressional investigation into oil flowing into the Gulf of Mexico in 2010. The decision left in place a second charge against the executive, for allegedly making false statements to investigators about the oil flow rate.

Destruction at Midwest City, Okla., one of the towns hit by the May 5, 1999, tornadoes.

A Brief History Of Oklahoma Tornadoes

The state straddles Tornado Alley and has had a number of especially strong twisters leave a path of death and destruction in their wake.

Tweets Capture 'Shock And Awe' At Tornado's Deadly Power

Twitter captures firsthand accounts and reaction from the massive tornado that swept through central Oklahoma.

Speedskaters practiced for the U.S. Single Distance Short Track Speedskating Championships in Kearns, Utah, last year.

Big Changes At U.S. Speedskating Body, But Scandals Linger

Rebellious athletes, drained budgets, dysfunctional management and a string of embarrassing scandals. Persistent turmoil at U.S. Speedskating threatened American success at the looming Winter Olympics in Sochi, Russia. So USS has undergone a major reorganization.

VIDEO: Tears Flow As Mom Finds Son After Tornado

Trenda Purcell searched for her 8-year-old son Kamden after Monday's tornado in Moore, Okla. When she found him, their reunion was emotional. The Oklahoman was there to capture the moment.

JPMorgan Chase CEO Jamie Dimon during testimony on Capitol Hill.

JPMorgan Shareholders Vote To Keep Dimon As Chairman, CEO

Some shareholders said splitting the roles would lead to better governance. The proposal received only 32 percent of the vote.

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