March 24, 2016

It takes two to tango, and Wednesday night in Buenos Aires, President Obama showed off his moves during an official state dinner.

The president and first lady both partnered with professional dancers, and did the Argentine tango in front of guests at the Centro Cultural Kirchner. At first, the president declined the female dancer's outstretched hand, The Associated Press reports, but ultimately the pair danced for about a minute to the delight of dinner attendees.

Obama's trip is about more than just doing the tango. He said he would declassify U.S. military and intelligence records from 40 years ago, when as many as 30,000 Argentinians were killed or disappeared after the country's military coup, and participated in a wreath-laying ceremony at the Buenos Aires Metropolitan Cathedral. Catherine Garcia

10:53 p.m. ET
Jeff Swensen/Getty Images

When it comes to combating terrorism, Donald Trump believes the United States needs to fight "fire with fire."

During a campaign stop Tuesday in Ohio, the presumptive Republican presidential nominee said waterboarding is "peanuts" compared to acts committed by terrorists, and waterboarding isn't "tough enough." Unfortunately, he continued, we have laws that prevent us from doing whatever we want against terrorists, even those who are "chopping off people's heads." You have to "fight fire with fire," he said. "We have to be so strong. We have to fight so viciously. And violently because we're dealing with violent people viciously."

Trump then asked the crowd to imagine terrorists sitting down "around the table or wherever they're eating their dinner," and the discussions they must have. "They probably think we're weak, we're stupid, we don't know what we're doing, we have no leadership. You know, you have to fight fire with fire." When his campaign was asked by NBC News if Trump was suggesting the United States conduct the same barbaric tactics employed by ISIS and other terrorist organizations, their question went unanswered. Catherine Garcia

10:07 p.m. ET

Update 10:06 p.m.: Turkish Prime Minister Binali Yildirim said at least 36 people were killed and 147 injured Tuesday in a coordinated suicide bombing at Istanbul's Ataturk Airport by three attackers. "The terrorists came to the airport in a taxi and then carried out their attacks," Yildirim said. "The fact that they were carrying guns added to the toll. Preliminary findings suggest all three attackers first opened fire, then detonated themselves." No group has claimed responsibility for the attack, and Yildirim said signs are pointing to the Islamic State, but he did not elaborate. Turkish Justice Minister Bekir Bozag told CNN no bombs were actually detonated within airport buildings; one blast occurred on the pavement outside the terminal and another at the airport entrance security gate. Our original post appears below.

Istanbul's Ataturk Airport was hit by two explosions Tuesday, leaving 10 people dead and wounding at least 20 others, Turkey's justice minister said. Officials have reported that the explosions were the work of two suicide bombers. Gunfire was also reportedly "heard from the car park at the airport," one witness told Reuters, and taxis are reportedly shuttling injured people away from the airport.

The Ataturk Airport features X-ray scanners at a checkpoint at the entrance to the international terminal, and then a separate security checkpoint further inside the terminal, BuzzFeed News' Middle East correspondent Borzou Daragahi explained. Turkish officials said police at the outer checkpoint shot at the two attackers as they approached the terminal entrance, at which point they detonated their bombs.

BBC Turkey correspondent Mark Lowen, who landed at Ataturk apparently right after the explosions, noted that the airport has long been considered a "vulnerable target" because of its lack of vehicle screening. The attacks follow several recent bombings in Turkey that have been tied to either Kurdish or Islamic State militants. Becca Stanek

9:42 p.m. ET
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Helium is used for a variety of things — to keep satellite instruments cool, to fill balloons, to clean rocket engines — which is why researchers are ecstatic over the discovery of a giant helium gas field in Tanzania's East African Rift Valley, estimated at more than 54 billion cubic feet.

"This is a game-changer for the future security of society's helium needs and similar finds in the future may not be far away," Prof. Chris Ballentine of Oxford University's Earth Sciences Department told the BBC. Helium is formed by the steady radioactive decay of terrestrial rock, and researchers say in the Rift Valley, volcanic activity is releasing helium buried in old rocks that becomes trapped in shallower gas fields. Because the world's helium supply was being depleted, the price has gone up 500 percent over the last 15 years.

Researchers say the amount of helium found in just one section of the Rift Valley is enough to fill more than 1 million MRI scanners, and now they just need to determine the best area to drill. "Helium is the second most abundant element in the universe but it's exceedingly rare on Earth," Prof. John Gluyas of Durham University's Department of Earth Sciences told the BBC. "Moreover, any helium that you do find if you're not careful will escape, just like a party balloon it rises and rises in the atmosphere and eventually escapes the Earth's gravity altogether." Catherine Garcia

8:14 p.m. ET
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A man who survived the coordinated attack Tuesday at Istanbul's Ataturk Airport said he saw one of the suicide bombers shoot people indiscriminately before he blew himself up.

Paul Roos, 77, told Reuters he was getting ready to board a plane back to his home in Cape Town, South Africa, when he saw the attacker "randomly" open fire as he walked through the terminal. "He was just firing at anyone coming in front of him," he said. "He was wearing all black. His face was not masked. I was 50 meters away from him."

Roos said he ducked behind a counter with his wife, but soon stood up to see what was going on. "Two explosions went off shortly after one another," he said. "By that time he had stopped shooting. He turned around and started coming towards us. He was holding his gun inside his jacket. He looked around anxiously to see if anyone was going to stop him and then went down the escalator…We heard some more gunfire and then another explosion, and then it was over." Catherine Garcia

7:39 p.m. ET
Gokhan Tan/Getty Images

No group has taken responsibility yet for the deadly blasts Tuesday at Istanbul's Ataturk Airport that killed at least 36 people.

U.S. officials told The Daily Beast they have no intelligence identifying the culprits, and the main suspects are the Islamic State and the Kurdistan Workers' Party (PKK), a militant group seeking independence for Kurds in Turkey. The PKK does not usually target citizens in its attacks, and the officials said they privately believe ISIS is likely behind the coordinated attacks; while they are suspected in several bombings across Turkey, they have never claimed responsibility for a bombing inside the country. Catherine Garcia

6:45 p.m. ET

Three crew members are missing following a head-on train collision Tuesday in Panhandle, Texas.

The BNSF Railway freight trains were on the same track when they collided, The Associated Press reports, and several of the boxcars carrying assorted consumer goods burst into flames. A BNSF spokesman said each train had two crew members, and one was able to jump from his train before the crash; his condition is unknown. The spokesman also said it's not known how fast the trains were going when they collided, or why they were both on the same track.

"I don't know how anyone survived," witness Billy Brown told AP. "It's terrible. I've seen a number of train wrecks but I've never seen one like this." BNSF has said it will meet a 2018 federal deadline to start using positive train control (PTC), technology that uses GPS, wireless radios, and computers to monitor trains and stop them or slow them down when they are close to derailing or hitting another train. Catherine Garcia

4:08 p.m. ET

CNN commentator and former Donald Trump campaign chair Corey Lewandowski said Trump's economy-focused speech Tuesday was his "best speech of the presidential cycle." Too bad everyone was too busy staring at the literal mound of trash behind Trump to listen to it:

Yes, that actually is trash — or, to be more specific, crushed aluminum cans — behind Trump. The presumptive GOP nominee was likely going for a message about supporting American industry, as he was speaking at Alumisource, which CNN describes as "a raw material producer for the aluminum and steel industries in Monessen, Pennsylvania."

Looks like he just opened himself up to a whole lotta trash talking instead. Becca Stanek

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