A poignant story on Memorial Day

This Memorial Day, join me in paying tribute to those who gave their lives for our country and for causes greater than themselves. I will remember one such person, who has brought considerable meaning to my own life: Pvt. Frank E. Mackey.

From Here to Mars: My Testimony before the U.S. Senate Subcommittee on Science and Space

Ten years ago I came out with a book, “Partners in Space: US-Russian Cooperation after the Cold War.”