To Miami, where a sixth day of searching at the site of the collapsed seaside apartment building has revealed no further survivors.
There are still 150 people unaccounted for, while 11 bodies have been recovered from the rubble.
While the cause of last Thursday's collapse remains a source of speculation, a succession of red flags about the building's integrity have been raised over the last three years.
Most recent was the observations of a pool contractor, who was startled by the quantity of water and level of beam deterioration in the building's basement when he visited just two days before the collapse.
Rick De La Guardia is the owner of a Miami engineering firm with experience in forensic investigation.
He spoke to Susie Ferguson.
