Saturday marked the two-year anniversary of the terrible tragedy of the collapse of the Champlain Towers South condominium building that killed 98 people in Surfside, Florida.  A variety of experts have weighed in on what caused the disaster, attributing it to beach erosion undermining structural support columns, questionable concrete design mixes during original construction, corrosion on the pool deck and deferred maintenance by the homeowner association   Read the article………………………..