Theories abound on why a Florida condo collapsed

ST. PETERSBURG, Fla. (AP) — From sinkholes to concrete-weakening saltwater intrusion, theories abound on what caused a Florida beachside condominium tower to collapse with no warning. The Champlain Towers South building in Surfside that partially went down was in the midst of its 40-year recertification process, which requires detailed structural and electrical inspections. Surfside Mayor [...]