Theodore Roosevelt was the 26th President of the United States, from 1901 to 1909. Here you can read about his six children, their lives at the White House and beyond. Find out which of his children served in World War I, in World War II, and which one was not afraid to adamantly disagree with their father. America250 is a multi-year effort to commemorate the semiquincentennial, or 250th anniversary, of the United States. The purpose of the U.S. Semiquincentennial Commission, created by Congress, and the corresponding America250 Foundation, is to catalyze a more perfect union by designing and leading the most comprehensive and inclusive celebration in our country's history. America250 represents a coalition of public and private partners all working to create initiatives and programs that honor our first 250 years and inspire Americans to imagine our next 250.