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Barack Obama made a surprise appearance at Michelle Obama's book tour in Washington, comparing himself to Jay-Z at a Beyonce concert.The former president showed up with a bouquet of flowers during the promotional event for his wife's memoir, "Becoming," in the nation's capital on Saturday night."This is like - you know when Jay-Z comes out during the Beyonce concert? ... Like, Crazy in Love?" he said, referring to instances when the rapper appears at his wife's concerts during performances of her famous song. "It's the same thing. It's just a little sample to enhance the concert."When the former president appeared on stage, an audience member yelled, "we miss you!" as the crowd cheered.The event was moderated by former White House adviser Valerie Jarrett. Michelle Obama talked about their life post-White House, and how they are taking a step back to reflect on what they accomplished."We haven't had much time to reflect over these eight years because we were so busy doing and so busy trying to be perfect, and to get everything right that rarely did we have time to sit back and acknowledge what we've done," she said."And I was able to do that with my husband just the other night. And just look at him and say, 'man, man you did this. You did this. You did one of the hardest jobs on the planet.'"Before former President Obama took the stage, his wife expressed frustration at today's heightened state of political discourse and said she sometimes wishes her husband would say something."There are so many times where I just want him -- like, I know, all of you - to just curse them out. Just say these things. And he's like, 'well, that's not the point. You know, the president isn't the president for his own ego. The president is the president for the entire country. So we have to be very mindful of what we say and how we say it.'"Comparing her husband's administration to that of President Donald Trump, Michelle Obama talked about the stark differences between the two."And the question that we have to ask ourselves is which feels better? You know, what world do we want to live in? What world do we want our kids to grow up in?"The former first lady has made several references to Trump in her memoir. In the book, she said she would "never forgive" him for his role in the "birther" conspiracy theory that falsely claimed her husband was not born in the United States. Trump's central role in pushing the falsehood put her family at risk, she writes.Trump pushed back last week, saying her accusations are meant to generate headlines."She got paid a lot of money to write a book and they always expect a little controversy," Trump said. 2670

BOULDER CITY, Nev. – What was supposed to be a routine bike ride turned into deadly crash in Nevada.Thursday morning, a box truck plowed into a group of bicyclists on U.S. 95, killing five of them.At least three other bicyclists were injured. One was airlifted to a hospital in critical condition from the scene south of Boulder City. Another one was transported by ambulance and is in serious condition. The third bicyclist suffered minor injuries.Troopers with Nevada Highway Patrol say the driver of the box truck was not hurt and is cooperating with police. They don’t believe at this time that the driver was impaired.The bicyclists did have a safety car with them at the time of the incident. However, one group of cyclists was in front of the car and the other was behind. It is not known which group was struck.“I don’t even know. It’s just the worst thing I’ve ever seen in my life," said former Las Vegas Metropolitan Police Department officer Michael Anderson.He was collecting his thoughts after a horrific day. Five of his fellow bicyclists were killed after that box truck struck their group.“Try to contact their families... I don’t even know how to say it to them,” he said.Anderson says the wind caused part of the group to get behind a safety vehicle to protect themselves when the box truck hit them. The group was on an annual bike ride, making a 135-mile loop into California.NHP troopers say the crash was one of the worst they’ve ever seen.“It’s a horrific tragedy when you have a beautiful sunny day like this, and we just lost the lives of five people,” Trooper Travis Smaka said.Watch law enforcement provide an update on the crash: 1667

BREAKING: @Twitter & @jack have suspended @DonaldJTrumpJr for posting a viral video of medical doctors talking about Hydroxychloroquine.Big Tech is the biggest threat to free expression in America today & they're continuing to engage in open election interference - full stop. pic.twitter.com/7dJbauq43O— Andrew Surabian (@Surabees) July 28, 2020 362

Beyond the beaches of the world, lies the potential for oceans of energy."I'm very excited about this because it's a very renewable energy-based technology,” said Professor Bruce Logan of Penn State University.Logan and university researchers recently created a device that removes salt from seawater in a cheaper way, allowing that water to then be used to create a renewable form of hydrogen fuel.“There's a lot of interest in renewable hydrogen,” Logan said. “Most of the hydrogen made today is made from fossil fuels, and so, we're interested in making that hydrogen from water.”That involves splitting water molecules into oxygen and hydrogen. The problem? Seawater also has salt, which needs to be removed first and that’s expensive to do.However, the “seawater electrolyzer” that Logan and his team worked on takes care of that issue cheaply by using a special membrane and without requiring expensive desalination plants. The findings were recently published in the Journal of Energy and Environmental Science.“Hydrogen is a great fuel,” he said. “It's been examined as a fuel for many decades now.”About 97 percent of all the water on earth is in the ocean, which means if it could be used efficiently to make hydrogen fuel, it could be a game-changer.“As we look to de-carbonize our fossil fuel infrastructure, we also can use it primarily for heavy-duty vehicles,” Logan said. “Airbus is looking to actually make airplanes that fly on hydrogen.”For now, though, their device would need to be scaled-up to a much larger version.“There are many nations and companies and nations across the world looking to do this. One of the biggest proposed hydrogen plants is in Saudi Arabia -- billion,” Logan said. “I would hope to convince them that it might be cheaper and better to use seawater directly, you know, in a system like this.”It’s a possibility that might one day create a bridge between our energy needs on land and the power in the sea. 1962

BRIDGEPORT, Calif. (AP) — Avalanche debris was spotted during a search for a missing Marine who failed to return from a backcountry skiing trip through the Sierra Nevada, California authorities said Sunday.First Lt. Matthew Kraft began trekking the rugged Sierra High Route on Feb. 23 and was scheduled to complete it Monday or Tuesday near Bridgeport, northeast of Yosemite National Park.The search on Sunday will primarily be air-based because "ground searching has proven to be too dangerous due to snow instability and avalanche concerns," the Inyo County Sheriff's office said in a statement. Much of the area was deemed impassable because of heavy snow and rock falls, the statement said.RELATED: Marine on ski trip to Sierras reported missingSearchers on Friday located a Jeep that Kraft parked at the start of his trip near Independence, about 130 miles (209 kilometers) south of Bridgeport, Inyo County Sheriff's spokeswoman Carma Roper said Saturday.Crews from local, state and federal agencies were searching a 400-square-mile (1,036-square-kilometer) area from Yosemite down to Sierra and Inyo National Forests and Kings Canyon National Park, Roper said.A series of winter storms has dumped record amounts of snow in the Sierra and led to avalanche warnings in the backcountry.Kraft is an infantry officer who received survival training in the field, military officials said. 1395