What does the 4th star mean on the American flag stand for?

What was a womens role in the 1930's? What main idea behind the pamphlet common sense that influenc ed many colonist? Why is 911 so important? What is an example of nativism? How long was the Lewis and Clark Expedition? What were some challenges the Corps of discovery had to face? What is manifest destiny-? What does the 27th amendment state? What is the value of the American dollar coin from 1779? Value of 1950 Series C 10 dollar bill? Where is Clara smith hamon? How the slavery led to the growing divide of the Union prior to President Lincolen? How much is a 1927 100 dollar gold and silver certificate worth? How did the steamboat impact us? What were the exports of the middle colonies? What year did herdan cortez come to America? Who won in the anaconda plan? When did Abraham Lincoln get elected for president? The united states employs what type of system is it a bicameral confederal unitary or federal? What is the origin of name for silver?