A time to mourn.

Comments on the airline crash of Swissair Flight 111. Number of people killed; Flight from New York to Geneva crashing into the Atlantic Ocean near Peggy's Cove, Nova Scotia; Transcripts of the conversation between pilots before the crash; Possibility that the aircraft suffered an electrical shutdown; View that the wiring led to the electrical shutdown; Use of Kapton insulation in the wiring of the plane; Why Kapton was banned from use by the United States military. INSET: A rekindled debate over wiring, by Tom Fennell et al..