At 250, here's what the U.S. can learn from Lithuania, a younger democracy aided by Chicagoans

VILNIUS, Lithuania — The cafes and bars in Vilnius, Lithuania's capital, bustle with fashionably dressed 20-somethings listening to music, sipping mango matchas and drinking local craft beer — what you'd expect in one of the most vibrant economies in Europe and a place recently pegged as having "the world’s happiest young people." Thirty-six years after becoming the first Soviet republic to declare independence and more than two decades after joining the European Union, Lithuania is home to six…