Unmannedrobots, sonar, dronesand sensitive microphones are being deployed in the search for survivors and victims.

New concerns are rising overHurricane Elsain the Atlantic Ocean.

President Joe Biden and First Lady Dr. Jill Biden surveyed the site Thursday.

“They’re going through hell.

“Jill and I wanted them to know that we’re with them and the country is with them.

Our message today is that we’re here for you, as one nation.

And that’s the message we communicated.”

Biden also directed expedited visas for family members of people touched in the collapse who live abroad.

In the wake of the building’s sudden collapse, details continue to surface.

Miami-Dade County has asked Champlain Tower residents who are safe to complete thisWellness Check form.

How many survivors and victims have been found so far?

Is there new information about why the Champlain Towers building collapsed?

Both the adjacent Champlain Towers North and East are still standing (more on this below).

What was the preexisting evidence that the building could collapse?

Environmental changes could have also contributed to the sudden failure.

Deeperinvestigation into possible causesis expected to start after the rescue operation ends.

Are the other two Champlain towers being evacuated?

The north tower was built in 1981, the same year as the south tower.

The east tower was built in 1994.

Which lawsuits are already filed?

Prieto still hasn’t spoken publicly about what happened.

Katie Teague contributed to this story.