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.
Captain Chesley Sully Sullenberger, who was hailed a hero after piloting the US Airways flight that landed on the Hudson River in January of last year, is retiring. Sullenberger will fly his final flight Wednesday afternoon with his co-pilot during the Hudson landing, First Officer Jeff Skiles.