July 31, 1973: A rescue worker stood next to a section of Flight 723’s charred fuselage. All 89 people aboard the wrecked Delta Airlines DC-9 jet, which crashed at Boston's Logan Airport, died. In the background, other planes prepared to take off.  The flight that preceded Flight 723 had made a successful approach and landed in the fog on runway 4R and the two flights that followed Flight 723, without knowledge of the accident, abandoned their approaches at the decision height because of weather. Those flights both landed safely in Providence, R.I.