In last month’s blitzkrieg tour of Central and Southeast Asia, two of the four stops Secretary Clinton made share the unfortunate bond of enduring an invasion by U.S. air and ground forces. In the space of a few days, Clinton visited both Vietnam and Afghanistan, thus physically linking what had once been, and then what has now become the United States’ longest war. One of the more insidious links that tie these conflicts together was highlighted in a few of the news stories about Clinton’s trip. That link, in a word, is agribusiness.