President Barack Obama addressed the nation today, pledging federal assistance for victims of the tornado in Oklahoma City, OK, which he has declared a major disaster. "Our focus as a nation is on the urgent work of rescue and rebuilding that lies ahead." The president also addressed confusion over how many people perished in the storm. Previous counts of 51 and 91 were revised downward to 24 Tuesday, as officials said some victims were counted twice. "We still don't know the human and economic losses that may have occurred," explained the president, who is in communication with state and federal responders. As more information comes out, read below to find out how you can help or donate.

A two-mile-wide tornado devastated the area around Oklahoma City on Monday afternoon, leaving at least 24 dead. More than 145 people are reported injured, and the death toll is expected to rise. There was initially confusion over the death toll, with a medical examiner reporting that 51 lives were lost, but now a different Oklahoma City medical examiner claims that number was "inaccurate" and the toll is actually around 24.

One farmer told a local station, "It was just like the movie Twister. There were horses and stuff flying around everywhere." This comes after another tornado killed two people in Shawnee, OK, on Sunday. Rescue workers are continuing to sift through the rubble from Monday's storm, which leveled neighborhoods and two elementary schools. The Red Cross is currently helping people in the Midwest, providing shelter, food, and emotional support following the tornado disasters. The Salvation Army is also taking donations. Watch CNN's coverage and a Vine clip of the destruction below.

This week on Mad Men, Don and the cool kids in creative decide to get a little help from a "complex vitamin super dose" before a weekend of work on the Chevy account. Young-at-heart account exec Jim Cutler brings in his doctor, who proceeds to administer the upper drug into the backsides of the eager staff. The good doctor doesn't even blink twice before giving a dose to Roger Sterling, who discloses his heart condition. Although, we don't get to see what effect the drug has on Roger. I hope we find out next week.

While viewers don't explicitly know what the super dose consists of, we do see its impact. An injured Kenny Cosgrove breaks into a manic tap routine. Stan Rizzo races through the office and comes up with hundreds of "ideas." And Don Draper zooms past doors, talks a mile a minute, and becomes obsessed with coming up with something to say to his mistress, rather than focusing on the Chevy account. At least that's what it seems like he's talking about when he shares his pitch with Peggy: "Let's say I get her face to face. How do I capture her imagination?" So what is this drug that turns everyone into momentary geniuses who actually create sober gibberish? Probably amphetamines — aka speed.

If the Sterling Cooper Draper whatever-they're-called-now staff remind you of the kids in college who got hopped up on Adderall before a big deadline, it might be because they are hopped up on Adderall before a big deadline. Or something similar, at least. "Amphetamine salts combo," the technical term for what is known today as Adderall, was approved by the FDA in 1960. It then went under the name Obetrol. It and similar amphetamines, like dextroamphetamine and benzedrine, were popular at the time as diet pills, study aids, or party drugs. So it seems likely the Mad Men team would call on it increase their alertness and motivation. Other side effects include increased sex drive, which could explain Stan's come-on to Peggy and Wendy Gleason. And we saw quite a few of the negative side effects play out on Don, including fever, sweating, and insomnia.

In the 1960s, amphetamines were also used to stimulate American military men during the Vietnam War. However, they were not popular with many hippies and counterculture figures like The Beatles and Allen Ginsberg, who favored the more mellow drugs marijuana and LSD. Maybe Don Draper isn't all that cool after all.

Queen Bey's little princess has her own backstage throne! Today on Tumblr, Beyoncé shared a new photo of daughter Blue Ivy, who is along on the Mrs. Carter Show World Tour. Just like mom, Blue Ivy can rock a wardrobe — check out her tutu! The family photo comes after Jay-Z reportedly denied rumors he and Beyoncé are expecting a second child and a few days after Beyoncé posted and then took down an Instagram message apparently addressing "people who have nothing better to do than talk about me." As we see with this latest photo of Blue Ivy, Beyoncé is one of many celebrities to share with fans on Tumblr, the social network Yahoo just bought for $1.1 billion. Be sure to check out more celebrities you should follow on Tumblr.

Yahoo! is buying Tumblr for $1.1 billion! On Sunday, Yahoo!'s board approved the deal for the microblogging network popular with animated GIF lovers and celebrities like Beyoncé. There are more than 108 million blogs on the social network, and the acquisition is yet another bold move by Yahoo! CEO Marissa Mayer, who is attempting to revitalize the Internet giant and appeal to a younger demographic. The deal, which is even bigger than Facebook's $1 billion acquisition of Instagram, is expected to be finalized as soon as Monday. Tumblr's 26-year-old founder David Karp dropped out of high school at age 15 to work as a programmer.

No matter how beautiful and romantic weddings are, they are still a legal contract. Many of the wedding traditions we've come to associate love, friendship, and fun with have very practical — and even horrifying — roots. Find out what came from where below:

• Wedding announcements: The Catholic tradition of "posting the banns" required a couple to announce their wedding in print; this helped ensure they were not related.
• Fathers walking brides down the aisle: Because weddings used to be business transactions, fathers walked brides down the aisle to transfer ownership to grooms. Romantic!
• Bachelor parties: Originally held by Spartan soldiers, bachelor parities were wild fetes to kiss the single life goodbye.
• Best man: "Best" used to refer less to the friendship quality and more to the man's sword skills. Because you can never have enough backup support for a runaway bride.
• Ceremony: The bride stands to the left during Christian wedding ceremonies, because the groom needed to be ready to fight off suitors with his right hand.
• Ring placement: Engagement and wedding rings are worn on the fourth finger of the left hand, because ancient Greeks and Romans believed that a vein in that finger led directly to the heart.
• Tying the knot: The phrase is derived from the literal practice of tying couples together to symbolize the commitment of marriage.
• Tossing bouquets: Newlyweds used to go in another room to seal the deal immediately after the wedding ceremony. Guests hung around outside to ensure the marriage transaction was completed, but men used to grab at the bride as she walked with her groom. So one inventive bride threw her bouquet to create a distraction, and other brides followed suit.

On Tuesday Angelina Jolie shocked the world by announcing she had a double mastectomy, but the major impact of her disclosure still lies ahead. The news is prompting women to talk about and research the BRCA1 and BRCA2 mutations and their own risk of breast or ovarian cancers. And on its newest cover, Time magazine dubs the impending cultural and medical implications "The Angelina Effect."

Health professionals expect a wave of women to come in to test their breast and ovarian cancer risk, even though the procedure is pricey and only one-tenth of 1 percent of women share Angelina's BRCA genetic mutation. For those who do decide to remove their breasts, Angelina has, as a sex symbol, helped shift the prospect from a perceived loss of femininity to an expression of it. She addressed her femininity head on in her op-ed: "On a personal note, I do not feel any less of a woman. I feel empowered that I made a strong choice." And she assured readers that implants can be beautiful, helping to alleviate any shame or embarrassment.

The actress and activist's influence was intentional when she shared her personal decision: "I want to encourage every woman, especially if you have a family history of breast or ovarian cancer, to seek out the information and medical experts who can help you through this aspect of your life, and to make your own informed choices." Being informed and empowered about your health just got sexy.

After 20 years, David Beckham is hanging up that soccer jersey we loved to watch him take off. In his statement, David said, "If you had told me as a young boy I would have played for and won trophies with my boyhood club, Manchester United, proudly captained and played for my country over 100 times, and lined up for some of the biggest clubs in the world, I would have told you it was a fantasy." For his fans, David has been a dream both on and off the field. While he won't provide anymore end-of-game stripteases, that could free up his time to strip down for his underwear ads. To celebrate his career, here are five reasons we love David Beckham, coming to you in GIF form.

He Looks Good Driving a Boat

David Beckham's triumphant Thames boat ride kicked off the London Games. He made sure the Olympic torch got there in one piece. Keep reading for four more GIFs!

Downton Abbey is getting a regular black character next season, but he won't be the first! According to this new Funny or Die video, Sean "Diddy" Combs was the first black character on the British drama. Watch as Diddy meets the Crawley family and their household staff, including Carson, who is not impressed, and Thomas, who is quite interested. Remember when you used to think Downton Abbey was called Downtown Abbey? Diddy still does.