@pbsnews: From the fight for independence to its emergence as the world’s leading military power, the United States military has helped shape the nation’s history over the last 250 years. But as the military’s reach has grown, fewer Americans are serving in uniform. Judy Woodruff explores what that means for the country in her series, Crossroads: America at 250. #news #pbs #pbsnews #crossroads #military #militaryhistory #History #unitedstates