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SpaceX chief Elon Musk is set Tuesday to unveil his ambitious plan to build a human colony on Mars, an endeavor that experts say requires tens of billions of dollars. SpaceX plans to send an unmanned Dragon cargo capsule to Mars as early as 2018, paving the way for a human mission that would leave Earth in 2024 and arrive on the Red Planet the following year. "It's unlikely that (Musk) will be able to get humans on Mars by 2025," said John Logsdon, former director of the Space Policy Institute at George Washington University, noting that Musk has wrongly forecast the launch of SpaceX rockets in the past.
"That means millions of Americans’ data may have been compromised for two years," the senators wrote in a joint letter addressed to Yahoo Chief Executive Officer Marissa Mayer. Yahoo did not immediately respond to a request for comment about the letter, which was signed by Senators Patrick Leahy, Al Franken, Elizabeth Warren, Richard Blumenthal, Ron Wyden and Edward Markey. Yahoo has faced mounting questions about exactly when it knew about the 2014 cyber attack that exposed the email credentials of users, a critical issue for the company as it seeks to prevent the breach from affecting a pending takeover of its core business by Verizon Inc .