President Donald Trump calls them 'super-duper' missiles though they're better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia ...

They fly at speeds of a mile a second or faster and maneuver in ways that make them extra difficult to detect and destroy in flight.

They fly at speeds of a mile a second or faster and maneuver in ways that make them extra difficult to detect and destroy in flight. President Donald Trump calls them a “super-duper missile ...

President Donald Trump calls them “super-duper” missiles though they’re better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia.

President Donald Trump calls them “super-duper” missiles though they’re better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia.

President Donald Trump calls them "super-duper" missiles though they're better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia.

President Donald Trump calls them a “super-duper missile," though they’re better known as hypersonic weapons.

President Donald Trump calls them “super-duper” missiles though they’re better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia.

President Donald Trump calls them a “super-duper missile,” though they’re better known as hypersonic weapons. And they are at the heart of Trump administration worries about China and Russia.

President Donald Trump calls them “super-duper” missiles though they’re better known as hypersonic weapons.