For some 20 years, Guarnizo lived a peaceful life in North Miami Beach’s Crestview Towers — a 156-unit condominium occupied by both young families and elderly residents, many with roots stretched throughout Latin America. Then the Champlain Towers South in Surfside collapsed in June, marking one of the worst building failures in U.S. history and sparking a citywide review of buildings 40 years and older — including her humble abode.    Read the entire article……………………………….