US marijuana crimes rise in agriculture areas

An increase in the number of illegal marijuana farms in the US has turned the heart of California's farmland, described by federal officials as the largest supplier of domestic supplies, into a battle zone. Marijuana crops in the region are being guarded with trip wires, motion detectors and shotguns. Nine people have been killed in crimes connected to marijuana in the last few years. And as Akiko Fujita reports, it's putting pressure on those keeping the peace.