Hawaii tests nuclear warning siren - BBC News
The US state of Hawaii has tested its nuclear warning siren for the first time since the end of the Cold War.
The US state of Hawaii has tested its nuclear warning siren for the first time since the end of the Cold War.

The resumption of the monthly tests comes amid a growing threat from North Korea's missile and nuclear programme.

Pyongyang has tested a series of ballistic missiles and in September carried out its sixth nuclear test.