Deployment of a more modern early-warning satellite, such as the one depicted at right, to detect missiles as they are launched into space.

The mobile Patriot launchers use radars to detect and track aircraft and missiles.

Under near zero, there can be questions about whether detected mobile missiles are legal or illegal.

They detect and track ships, planes, and missiles.

It can detect missiles up to 1,500 miles away.

The second step would be to modernize early warning satellites to detect hostile missiles as they rise into space from their launching pads.

They have an infrared camera for detecting incoming missiles.

There is also some concern about China, which has a meager capability to detect incoming ballistic missiles.

Both superpowers built large radar arrays to detect incoming bombers and missiles.

Because of these serious defects in its early warning system, Russia cannot detect American intercontinental missiles for a period of three hours per day.