The US's missile capabilities are not as advanced as Russia and China, according to a Space Force general.
The vice chief of space operations said on Saturday that we are not as advanced as the Chinese or Russians in terms of hypersonic programs.
He spoke at the security forum.
He said the US is catching up very quickly.
The US is trying to figure out the type of satellite constellation that it needs to track missiles coming from Russia and China, he said.
"It's not that we don't have an answer to this challenge," he said. We have to understand it, design it and fly it.
Russia and China have been testing missiles.
Russia's defense ministry said last month that it had successfully launched a new type of missile.
China said it was just trialing a space vehicle, despite reports that it had tested a nuclear- capable hypersonic missile.
The US Navy is working on a type of missile.