High tech and low tech busts

I haven't heard of this detection method before. US Customs agents at the Canadian border performed a gamma-ray scan of an inbound truck and found 34 plastic garbage bags filled with marijuana. It sounds suspicious to me but according to this paper it's a common practice.

Meanwhile, in Louisiana three men were arrested after a high speed chase during which they started tossing marijuana out of the car. It doesn't say how much but can you imagine driving down the highway and all of sudden a bag of cannabis hits your windshield? You would have to hope it was high grade buds and not some compressed brick of Mexican like we used to see in the "old days." Those puppies could do some real damage.