WASHINGTON (AP) — Members of the U.S. special operations forces say that allowing women to serve in Navy SEAL, Army Delta or other commando units could hurt their effectiveness, lower the standards and drive men away from the jobs.

The troops told a Rand Corp. survey that they believe women don’t have the physical strength or mental toughness to do the grueling jobs. And their message to political leaders is that when they are fighting in the shadows or bleeding on the battlefield, women have no place on their teams.

More than 7,600 of America’s special operations forces responded to the RAND survey, which was released when Defense Secretary Ash Carter announced last week that he was opening all combat jobs to women.

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