Search and rescue operations ceased on July 3 so that crews could prepare to raze, using charges, the damaged wing of the partially collapsed Champlain Towers South condominium.

Investigators probing the trigger of the progressive collapse of a section of the Florida residential condominium are preparing a computer model of the unstable 12-story tower remains to advise about vacating rescuers in the event of a hurricane. 

Structural engineers have pieced together the probable sequence of the fatal progressive collapse of part of the 12.5-story residential condominium in Surfside, Fla., but the trigger remains a mystery.