The New York Times
By ANTHONY DePALMA
Published: March 15, 2003
WINGED SENSORS -- Dozens of pigeons were distributed to Marine units in Kuwait to warn them of chemical attacks. Like the canaries that miners once carried in case they ran into explosive gas, the pigeons fall victim to dangers more quickly than humans. The Marines will also be equipped with $12,000 mechanical sensors. The pigeons cost $60 each, plus seed.
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