The recent and tragic bridge collapse in Minnesota raises many questions in Americans' minds about our aging infrastructure, and what is being done to maintain it. Questions such as: "Was I-35 an isolated accident or are we approaching days when crumbling bridges and bursting pipes will be regular features on the evening news?" The poor ratings on the inspection report of that bridge, and similar deficiency findings on as many as 25% of our bridges suggests the latter. Estimates on what it will cost to bring deficiencies in our infrastructure back up to par range from massive to astronomical. Billions...