Hijacked satellites and orbiting space weapons: In the 21st century, space is the new battlefield

As Russia held its Victory Day parade this year, hackers backing the Kremlin hijacked an orbiting satellite that provides television service to Ukraine.

Instead of normal programing, Ukrainian viewers saw parade footage beamed in from Moscow: waves of tanks, soldiers and weaponry. The message was meant to intimidate and was an illustration that 21st-century war is waged not just on land, sea and air but also in cyberspace and the reaches of outer space.

"If you can impede a satellite's ability to communicate, you can cause a significant disruption," said Tom Pace, CEO of NetRise, a cybersecurity firm focused on protecting supply chains.

"Think about GPS," said the former Marine who now works on cyber issues at the Department of Energy. "Imagine if a population lost that and the confusio