By Mike Rosso Hannes Zacharias is on a mission. But the 64-year-old resident of Lexana, Kansas is not on just any mission. He is currently in the process of “following a drop of water” from the headwaters of the Arkansas River in Colorado to the Gulf of Mexico. And why would he take on such and ambitious feat? It all dates back to a kayak trip he took in the summer of 1976, at the age of 22. Back then he borrowed the family’s collapsible Klepper kayak and proceeded to “float” the Arkansas from Dodge City, Kansas to New Orleans. ...