What is better on a beautiful summer’s day than to take a backroads trip to Fort Osage, Missouri National Landmark? This fort is a surprise. There are decades of  U.S. history represented here.     Let’s face it. We grew up watching “cowboys and Indians” on television. Although a lot of those shows bent the truth, I’d like to think they instilled a love of history-especially history of the frontier-in our generation.     As you explore America’s midwest, there are many forts to visit, but none has so many layers of American history.      Fort Osage is also an inexpensive educational stop to make if you are traveling with grandchildren, school children or…