Gays and lesbians have adopted the phrase "it gets better" as a kind of slogan to assure young people that life won't always be so tough. Looking back, life has gotten dramatically better for LGBT people in the United States in a very short period of time. The modern gay rights movement began less than 50 years ago. Today, supporters of same-sex marriage outnumber opponents. Now, the Supreme Court is about to hear two big cases that could shift the landscape for gay rights again.