https://blog.wongcw.com/2022/05/24/darpa%e7%9a%84liberty-lifter%e8%a8%88%e5%8a%83%e6%97%a8%e5%9c%a8%e4%bd%bf%e9%87%8d%e5%9e%8b%e5%9c%b0%e9%9d%a2%e6%95%88%e6%87%89%e6%b0%b4%e4%b8%8a%e9%a3%9b%e6%a9%9f%e5%9b%9e%e6%ad%b8/