Good day to all you paraskavedekatriaphobia-sufferers (people who fear Friday the 13th)

4:30 p.m. ET: Camera monitor shows "Nightline" anchor Cynthia McFadden on the set ABC Channel 7 to tease her upcoming special edition report tonight:

Credit: Cassy Arsenault

3:53 p.m. ET: Confirmed. Brad Pitt and Angelina Jolie are engaged. Everyone can rest easy now. In case you were wondering, the jeweler who designed her engagement ring spilled the beans.

Credit: LACMA/PRNewsFoto

3:51 p.m. ET: ABC's Jim Hill reports that Cate Edwards, the oldest daughter of John Edwards and his late wife, Elizabeth, is among the witnesses who may be called to testify in the criminal trial that could send her father to prison for up to 30 years.

3:30 p.m. ET: It's looking like it could be a wicked weekend of tornadoes for the Plains states. The National Oceanic and Atmospheric Administration's Storm Prediction Center issued a rare, high risk today for severe weather Saturday from Oklahoma through Kansas.

1:58 p.m. ET: Are you a "typical" Las Vegas visitor? The Las Vegas Convention and Visitors Authority's recently-released 2011 Las Vegas Visitor Profile Study. We broke it down in a way that was appropriate for Sin City:

Credit: Info graphic by ABC News' Ma

1 :05 p.m. ET: President Obama's camp released his tax returns from 2011, which shows, as ABC's senior White House correspondent Jake Tapper writes, that Obama paid an effective tax rate of 20.5 percent last year. Read more

12:11 p.m. ET: Check out this "bicycling bug":

Credit: Eco Suparman/Caters News

OK, so it's really just a praying mantis resting on a fern, but macro photographer Eco Suparman was shocked when a praying mantis he was photographing jumped up onto the curled plant and looked just like he was pedaling away on a bicycle.

11:33 p.m. ET: Authorities in San Francisco are on the hunt for a blond woman who allegedly attacked a restaurant manager with the heel of her  Christian Louboutin shoe and then fled the scene. Not one to be walked all over (sorry, puns), San Francisco restaurant manager Matt Meidinger has tweeted, Facebook-ed and Instagram-ed the mystery assailant's photo in hopes that someone will identify her.

9:35 a.m. ET: TONIGHT, in a special edition of "Nightline," anchor Cynthia McFadden brings us a story she has spent two years reporting on: Parents who are spending thousands of dollars to prep their 4-year-olds for a standardized test that could get them into a "gifted and talented" kindergarten.