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In a series of unusually candid remarks, the US general in charge of the nation's nuclear arsenal has issued a stark warning that Russia and China are "aggressively" developing new high-speed, or hypersonic, weapons that the US currently has no defense against.The weapons might not be operational for several years, but Gen. John Hyten, the four-star head of US Strategic Command, is warning that changes to missile defenses are urgently needed or the US will be unable to detect them when they are operational."China has tested hypersonic capabilities. Russia has tested. We have as well. Hypersonic capabilities are a significant challenge," Hyten told CNN in an exclusive interview. "We are going to need a different set of sensors in order to see the hypersonic threats. Our adversaries know that."Hyten and other military officials say the current generation of missile detecting satellites and radars won't be enough to detect these new generation weapons. Hypersonic is generally defined as a speed of Mach 5 or over 3,806 miles per hour."We've watched them test those capabilities," Hyten told Congress last week. But with unusual public candor about potential US military shortfalls, he acknowledged "we don't have any defense that could deny the employment of such a weapon against us, so our response would be our deterrent force, which would be the triad and the nuclear capabilities that we have to respond to such a threat."Hypersonic missiles fly into space after launch, but then come down and fly at high speeds on a flight path similar to an airplane. Their lower trajectory make them more difficult for US missile defense satellites and radars to detect. Russia has openly stated it is developing high-speed air-launched missiles as well as underwater hypersonic drones.The Pentagon is currently writing a review of its missile defenses to help determine what new capabilities might be needed to deal with new classes of attack weapons. Hyten gave Congress a hint of what may be in that review stating "the first thing we need is better sensor capability, better tracking capabilities to make sure we can characterize and then respond to that threat."He also called for improved US warheads, essentially "better kill vehicles on the top of our interceptors so that those kill vehicles become more and more lethal." The Pentagon is also working on concepts for interceptor missiles that repel a barrage of enemy attack missiles. Current US missile defenses are designed to only shoot down a small number of enemy missiles.The US focus has largely been to work on hypersonic technologies across the board. But Russia is now well into testing some of its systems. Earlier this month Russia showed video of what the Kremlin said was an air-launched hypersonic ballistic missile.When asked how far along the Russian hypersonic program is, Hyten told CNN, "I don't want to put a who's winning the race, I'll just say there is a race."When asked how soon it could be before the Russians have an operational hypersonic weapon that could reach the US, Hyten said, "It's similar to the North Korea problem. If you continue to pursue that technology, you will get there. And the Russians will get there, the Chinese will get there and we'll get there -- and we'll have to figure out how to deal with that." 3323

How do astronauts go to the bathroom? It’s a question children have wondered for years, and now NASA wants help creating a better way.In a statement posted on their website, NASA is calling on the entire world to submit design concepts for compact toilets that can operate in both microgravity and lunar gravity.NASA is preparing to return to the Moon by 2024 as part of project Artemis, and as they upgrade other aspects of the flight, they are seeking new ideas for toilet facilities when astronauts are in the cabin and out of their spacesuits.Specially-designed toilets exist on the International Space Station already, however according to NASA, they were designed for microgravity only.NASA and HeroX are offering financial and merchandise rewards for winning design concepts in this Lunar Loo contest.Details about how to enter the contest can be found here. 873

Hurricane Irma may be gone, but days of darkness and devastation are just beginning in Florida.Residents could go for days without power after the storm uprooted homes, trees and power lines, leaving 4.4 million customers without electricity statewide in simmering temperatures, officials said."Temperatures will be around 90 for many, especially central and southern Florida for the next several days," CNN meteorologist Taylor Ward said. "High humidity will make it feel like the low to mid-90s. While it isn't above normal, it's certainly warm and humid which is miserable without power." 599

If you've texted with an iPhone user in the past few days, you've probably had a tough time reading their messages.That's because a bug with the latest version of the phone's operating system is causing problems with a single letter — the capital I.Over the weekend, users began reporting bugs when trying to type messages with a capital I. For some reason, the letter auto corrects to a capital A with an unknown character.  448

HOUSTON, Texas — Houston's police chief says four police officers have been terminated after an internal investigation determined they did not use reasonable force when they fired their weapons 21 times at a man who had been experiencing a mental health crisis.The man, 27-year-old Nicolas Chavez, was already injured and on the ground when he was shot and killed by the officers on the night of April 21.During a news conference Thursday, video footage was presented from body cameras showing Chavez, who had already been shot and was bleeding, kneeling on the ground and grabbing a stun gun when the four officers shot him.WARNING: The video below contains graphic clips and may be difficult to watch."Let me be clear, it's objectively not reasonable to utilize deadly force when a man's already been shot multiple times, has been tased, has been on the ground, has shown that he really cannot get up," said Police Chief Art Acevedo on Thursday. "I cannot defend that."At the briefing, Mayor Sylvester Turner said the dismissal of the four officers isn’t an indictment of the police department and its nearly 5,300 others officers.“But when you are wrong, there are consequences,” he continued. “And for the good of every police officer who serves, for the good of everyone that followed the rules, that protect this city, it is important for us to call a ball a ball, and a strike, a strike."Turner acknowledged the effect Chavez’s death has had on the city and expressed sympathy for his family."What happened the night of April 12 has dramatically affected many people and this City,” said the mayor. “Nicolas Chavez’ life was taken, and his family must live with their personal loss and anguish for the rest of their lives."Leaders with the Houston Police Officers’ Union denounced the firings, saying the officers followed tried to de-escalate the situation but were forced to shoot Chavez.“This unjust and deplorable decision by Chief Acevedo has sent a shock wave through HPD, even if you deescalate, retreat, follow policy, training and the law...you will still lose your job as a Houston Police Officer,” tweeted Joe Gamaldi, the president of the Houston union.Harris County District Attorney Kim Ogg said in a statement Thursday that prosecutes will be conducting an independent review of all the evidence in Chavez’s death and once it’s complete, the findings will be presented to a grand jury. They’ll determine whether charges will be brought against the officers involved. 2496

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