Sanho Tree at the Institute for Policy Studies reminds us that when Washington ramped up its anti-drug efforts through Plan Colombia, more than 90 percent of the cocaine consumed in the United States came through Colombia. A decade later, we get about 97 percent of our cocaine via Colombia. President Barack Obama recently admitted that drug legalization was a valid subject for debate even though he didn't support it himself. That was the most daring admission made by any sitting U.S. president on this subject. If he's serious, we should stoke this debate before another 35,000 lives are needlessly lost. There are many alternatives in the spectrum between prohibition and total free market legalization.