On March 12, 1948, at 9:14 p.m. Pacific Standard Time, Northwest Airlines Flight 4422 crashed into Mount Sanford, a peak in the remote Wrangell Mountains in eastern Alaska. All 24 passengers—merchant mariners returning to the U.S. from Shanghai, China—along with six Northwest crew members, probably died on impact. The debris, too difficult to reach, was quickly covered by snow and eventually entombed by ice.