November 18, 2010 5:33 PM

Mexican cartels amass better arsenals, mostly bought in U.S.

As recently as a year or two ago, commandos fighting for the Mexican drug cartels often would rather flee than confront security forces. But an influx of combat weapons — purchased at U.S. gun shops and shows or stolen from Central American munitions stockpiles — and a vast supply of ammunition now enables them to fight, and sometimes outgun, army and federal police units.

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