Income Tax...............
1) WWI
2) The Russian revolution with the rise of communism
3) The great depression
4) The holocaust
5) The begining of the Nuclear age
The modern United States receives its crowning star when President Dwight D. Eisenhower signs a proclamation admitting Hawaii into the Union as the 50th state. The president also issued an order for an American flag featuring 50 stars arranged in staggered rows: five six-star rows and four five-star rows. The new flag became official July 4, 1960.
I believe probably 282,000 Kilometers.