Alejandro Clemente González was talking with an electrician while preparing for weekend services at Cuba's most important Baptist church when an enormous explosion shook the building and shattered the 19th century dome towering far above the pews.
Concrete plunged from walls, wood and glass showered down from the windows as an apparent gas explosion next door killed at least 43 people in and around the devastated Hotel Saratoga in Old Havana on May 6.
