“The issue comes down to this: The NSA metadata-collection program costs lots of money, and had funds not been expended on it, they could have been used to support other programs that might have been far more effective in saving American lives.”

American aerospace engineer and author

Robert Zubrin is an American aerospace engineer, author, and advocate for human exploration of Mars. He is known for arguing that space will shape future military and political power, and for making the case for a stronger American role in space. His writing often turns on Mars exploration and on the strategic importance of space. He has also argued that control of space will matter in future conflict, and that peace on Earth depends on preparing for war beyond it.