 This is Morning Edition from NPR News. I'm Michelle Martin. And I'm A. Martinez. As Americans this week celebrate the signing of the Declaration of Independence in 1776, we turn to another fight for independence, one that took nearly 150 years more. The new Broadway musical, Suffs, is about some of the personalities who led the fight to give women the right to vote. NPR's Elizabeth Blair brings us the history behind some of the songs.