Salinas said that because of Frida’s age, Evil and Echo, who are a year and a half old, usually go into collapsed buildings first. If they detect a person, Frida follows up to confirm. She usually spends no more than 20 minutes inside.
Salinas said they bark if they detect signs of life. If they find a corpse, they stop suddenly, then carefully proceed.
"They act afraid," he said. "That indicates to us that there is a cadaver."
He said the spaces that Frida and the other dogs have had to search are less than 20 inches high. In some places, the dogs had to crawl, getting much deeper into the rubble than rescuers could.
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A Sept. 13, 2017, tweet shows Frida, a member of the Mexican navy's Canine Unit. Frida has taken part in search and rescue efforts after the latest quake in Mexico. (@SEMAR_mx / @SEMAR_mx)
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