February is Black History Month in the United States, a time for paying tribute to people and events that shaped the story of African Americans. One of those events was the Emancipation Proclamation, signed by President Abraham Lincoln 150 years ago. It began the process of freeing an estimated four million slaves. Afterwards, the 13th amendment to the U.S. Constitution abolished slavery across the United States. As a result, many freed slaves came to Washington, D.C., looking for a better life. VOA's Chris Simkins has more on the people who are working to make sure that the story of former African American slaves live on.