Here are some one liners...
Liberia Means Liberty -- The first ship takes free Negroes to their new home, Liberia. It's not going to solve the slave problem in America though.
The Missouri Compromise Means Slavery -- To keep the balance of power, Maine is a free state and Missouri is a slave state. Congress has kicked the can down the road to the American Civil War. (I talk about Social Security in terms of the slavery problem.)
Joseph Smith's First Vision -- He sees angels, and the Church of Latter-day Saints has its beginnings here. I talk about visions and messages from God. Yes. I believe in them.
In Other News -- Antarctica, Venus de Milo and low-priced government land!
Update (July 5, 2016): Added Joseph Smith's First Vision.
Liberia Means LibertyThe newly renamed ship, Mayflower of Liberia, sets off with 86 former slaves in order to establish a new nation in Africa. The word "Liberia" means "Land of Freedom". For several years now a group of abolitionists and slave-owners have joined together to solve the problem of the free negro. He is free from slavery but not really part of society. Slave-owners, such as Congressman Henry Clay, worry that the free negro will become a source of disruption and will encourage slaves to run away. That is why the American Colonization Society was established to find a place for the free negro settle, and make a life for himself... far, far away from American slaves. A plot of land was leased last year, south of the British colony of Sierra Leone, in West Africa. They call it Liberia. It's capital will be called Monrovia, named after President James Monroe, the current President of the United States of America who has won reelection in a landslide. (He ran unopposed, but one elector voted for John Quincy Adams anyway.) By next year the Afro-American settlers will buy Liberia from the natives.  
The Missouri Compromise Means SlaveryAfter the Louisiana Purchase, Congress has been debating whether future states should be admitted as free or slave. The debate has come down to politics and economics. If both Maine and Missouri are accepted as free, the Northern industrial states will have a clear majority, and use their power to set excise taxes that will kill the South's agrarian economy. The Congress is in deadlock, so they agree to a compromise. Maine will be accepted into the Union as a free state this year and next year, Missouri will be accepted as a slave state. The Congress has kicked the can down the road, but this road leads to the American Civil War. It didn't start out as a civil war, but it became one fairly quickly. It started just like Britain voting to exit the European Union in June 2016. The British Exit vote or Brexit (BRECKS-it) could be called many things but not a civil war. Nevertheless, the European Union is debating whether to punish the UK or not. I doubt there will be a war, but there will be a lot of finger-pointing and name-calling in the future.    
Joseph Smith's First VisionJoseph Smith has seen angels. Smith is a 14-year-old farm boy, living near Manchester, New York. After recovering from a crippling bone disease, the young Smith has become interested in religion. The Second Great Awakening movement has been gaining momentum. It is a movement that emphasizes an emotional connection to the supernatural.. which is an academic way of saying that mysticism and folk magic are becoming popular again. Just note that Smith is delving into serious stuff and if he is not careful, he is going to get in over his head. He enters a grove of trees to ask God for guidance. (This is classic.) He sees a light and two angels appear before him. (He later identifies them as the Lord and Jesus.) The Lord tells young Smith that the churches of the day have drifted away from God's original path over the centuries. The Lord then forgives Smith for his sins. Joseph Smith tells others about his experience, but no one believes him. This First Vision is considered the beginning of Mormonism and the Church of the Latter-day Saints (LDS). The first church won't be organized until 1830.   
In Other News
- Antarctica is discovered.... sort of. Several explorers claim to have spotted it.