ON TRACK TO STOP DRUGS U.S. officials are attempting to stem the flow of illegal drugs via railroad where trains cross the border between the U.S. and Mexico: Calexico
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Tecate
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or
Pacific Ocean
Presidio
Nogales
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Otay Mesa/ San Ysidro
UNITED STATES
El Paso
a
MEXICO
Source: U.S. Department of Transportation, Bureau of Transportation Statistics
Eagle Pass
San Houston Antonio Laredo
Gulf of Mexico Brownsville ROBERT DIBRELL : C H R O N I C L E