"Every missile that comes off the planet is seen first by one of our overhead missile warning capabilities," Hyten said, adding that the satellites are "not easy to defend."
Republican Rep. Mike Rogers of Alabama, a member of the House Armed Services Committee, spoke alongside Hyten about the threats to US satellites.
"Most folks aren't thinking about the fact that our first way of detecting a launch by North Korea, so that we can turn our radars to start tracking it and start aiming our interceptors to be able to get it in time, is a satellite up there waiting for that heat signature," said Rogers, a vocal advocate of creating a separate US military Space Corps.
"We can not let that satellite be dazzled for 10 or 15 minutes, it would be too late," he added.
Hyten advocated for making satellites more defensible, but he acknowledged that there are currently no rules of engagement when it comes to military conflict in space, adding that international norms are needed.
Heather Wilson, the secretary of the Air Force, said the US needs to embrace a new policy and make it clear that if command and control or warning satellites are targeted, the US "would consider that to be a hostile act" and respond.
"It's probably time as a country that we start to talk about this," Wilson said.
(CNN)