America's transportation system is falling apart. More than half of all roads, highways and bridges are "obsolete" or "at high risk for catastrophe." The American Society for Civil Engineers says the cost of repair will be $3.6 trillion — if money's available over the next five years. But the Highway Trust Fund will run out on Friday, with Congress leaving for summer vacation. In both the House and the Senate, long -term funding has been caught up in short-term politics. We look at the consequences of falling behind — compared to what's possible for "the world's most advanced nation."