Guadalajara, Mexico

Mexican troops have made a historic seizure of 15 tons of pure methamphetamine.

This amount is equivalent to half of all meth seizures worldwide in 2009.

The haul could have supplied 13 million doses worth over $4 billion on US streets.

The findings came from several anonymous tips.  The army statement called the seizure "historic," implying it was the largest on record for the armed forces.

There were no people found on the ranch or arrests made, although it appeared 12 to 15 people worked there.