Harris, Sally L.2013-05-062013-05-062004-09-13http://hdl.handle.net/10919/21160He has traveled 7.8 million miles. He has experienced 16 sunrises and sunsets a day. He has floated around like a helium balloon, unshackled by gravity. And now he has turned the focus of his work on the moon and Mars and beyond.text/htmlIn CopyrightPress releaseVirginia Tech. University Relations