Crews nearly done drilling for Florida building demolition

An American flag flies from a crane next to the Champlain Towers South building (Lynne Sladky/AP)

Demolition specialists carefully bored holes to insert explosive charges into the precarious, still-standing portion of a collapsed South Florida building that will come down to open up new areas for rescue teams to search.

Some 80% of the drilling work was complete, and the remaining structure could come down as soon as Sunday night, Miami-Dade assistant fire chief Raide Jadallah told relatives of those missing in the collapse.