The Pentagon says it is making progress in developing weapons for its newest battleground - cyberspace - but still faces funding, technology and policy challenges.
Industrial output was flat for a second straight month in March, held back by a drop in manufacturing, according to a Federal Reserve report on Tuesday that suggested a cooling in factory activity.
A welder's torch ignited a small fire on the roof of a building at a nuclear research laboratory in Idaho on Monday, prompting an evacuation, but no one was hurt and no radioactive material was involved, lab officials said.
The bodies of four missing miners have been found in West Virginia, taking the death toll to 29 and making it US coal mining's worst accident in 40 years. Difficult conditions had hampered rescuers in their search for survivors after Monday's underground explosion at the Upper Big Branch Upper mine.
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