Confidence votes 213. Gas Chromatography/Mass Spectrometry is as close to being a perfect drug test as it's possible to get. It's done in a computerized machine. It turns the sample to a gas, directs the gas into a little tube, and analyzes the way the components of that gas array themselves in the tube.
Vegas Liberty is about two-fifths the height of the original (150 feet versus 350 feet), weighs far less (150 tons versus 27,000 tons) and is way younger (about 15 years compared with 127). Photo.
In case you don't have a clue about how tall 115.72 m (379.7 feet) is: the height of Big Ben in London is 96.3 m (316 feet), that of the statue of Liberty is 46.5 + 46.9 m (151 + 154 feet), so both tall constructions are largely lower than these trees.