Today is Friday, Dec. 20, the 355th day of 2024. There are 11 days left in the year. Today in history: On Dec. 20, 1989, the United States launched Operation Just Cause, sending troops into Panama to topple the government of Gen. Manuel Noriega. Also on this date: In 1803, the Louisiana Purchase was completed as ownership of the territory was formally transferred from France to the United States. Related Articles National News | LA Zoo hatches first-ever perentie lizards, one of largest lizard species in the world National News | Immigration agency deports highest numbers since 2014, aided by more flights National News | Farmers, business owners, homeowners face uncertainty after $100B in disaster relief flounders National News | FDA updates the definition of ‘healthy’ foods National News | Millions of people may get expanded Social Security benefits.