SURFSIDE, Fla. (AP) — The mangled concrete and twisted rebar from the collapsed high-rise near Miami triggered flashbacks for retired Oklahoma City Fire Chief Greg Marrs, who spent weeks with his crew digging through the rubble of the Alfred P. Murrah federal building in 1995. From afar, Marrs empathized with the Florida teams searching the debris that was once the 12-story Champlain Tower South condominium complex. The scenes in Surfside brought back memories of the urgent search for survivors after the Oklahoma City bombing, followed by the heartbreak of pulling out nothing but bodies, he said. It was the same for other rescuers who responded to past tragedies. They say the crews in Surfside will carry on with the same commitment and care, even though authorities this past week officially gave up on finding any survivors. Joseph Pfeifer, former counterterrorism and emergency preparedness chief for the New York Fire Department, was one of the first commanders on the scene after the World Trade Center towers came down in 2001. He said the Florida crews will preserve any human remains and separate any building pieces that provide clues to the cause of the collapse. When Marrs first saw photos of the Florida collapse, he said, the images were reminiscent of the destruction at the federal building after a truck filled with explosives was detonated outside. The blast killed 168 people.