Nucleotidings

Ambient office  = 104 nanosieverts per hour

Ambient outside = 96 nanosieverts per hour

Soil exposed to rain water = 95 nanosieverts per hour

Ambient office  = 95 nanosieverts per hour

Ambient outside = 89 nanosieverts per hour

Soil exposed to rain water = 95 nanosieverts per hour

Ambient office  = 116 nanosieverts per hour

Ambient outside = 102 nanosieverts per hour

Soil exposed to rain water = 102 nanosieverts per hour

Satellite photos indicate North Korea is building a ballistic missile submarine and may be making preparations to test a submarine-launched missile, according to an analysis of the commercial images by experts at a Washington-based think tank. Nbcnews.com