The U.S. military is investigating two deadly helicopter crashes that occurred within a 24-hour period.
The Navy says a helicopter with five people on board went down in the Atlantic off the coast of Virginia Wednesday. Of the four crew members rescued, one died a few hours later. The other three were being evaluated at a hospital.
The search continues for the fifth person in 5 degree Celsius waters. The Navy said the MH-53E Sea Dragon was conducting routine training operations.
In Britain, an investigation is under way in a remote marshland area, after a U.S. Air Force helicopter crashed, killing four airmen late Tuesday.
The Air Force said the Pave Hawk helicopter was on a low-level training mission when it went down more than 200 kilometers northeast of London.