Kevin Woodridge shares this information:
March 20, 1997 is the date of the collapse of the 1989 foot KNOE-TV Monroe LA
tower near Riverton LA. Other tenants on the tower included KNOE-FM and the
local PBS affiliate. Reason for the collapse was the failure of a maintenance
crew to install a temporary brace during removal of diagonals. The following
links give more info...
http://caselaw.lp.findlaw.com/cgi-bin/getcase.pl?court=5th&navby=case&no=0130193cv0
http://lists.contesting.com/archives/html/Towertalk/1997-04/msg00207.html