Hyponatremia refers to a low level of sodium in the blood. Hyponatremia may result from excess fluid in the body relative to a normal amount of sodium, or it may be due to a loss of sodium and body fluid. Symptoms are nonspecific and can include: mental changes, headache, nausea and.
A third plane, American Airlines Flight 77, hit the western side of the Pentagon, just outside Washington, D.C. The fourth hijacked plane, United Airlines Flight 93, crashed down in a field in rural Pennsylvania, never reaching its intended target because its crew and passengers fought back against the terrorists.
F-16 Thunderbird crashes; pilot taken to hospital 00:51. (CNN)The pilot of a Blue Angels jet was killed Thursday during practice for a weekend air show, hours after a Thunderbirds F-16 crashed following a flyover at the U.S. Air Force Academy commencement ceremony attended by the President, officials said.