On this day in 1807, a grand jury indicted former Vice President of the United States Aaron Burr on a charge of treason.
On this day in 1849, future US President Abraham Lincoln was issued a patent for an invention to lift boats over obstacles in a river, making him the only US President to ever hold a patent.
On this day in 1990, Microsoft released the Windows 3.0 operating system.
And on this day in 2012, Tokyo Skytree was opened to public. It is the tallest tower in world, and the second tallest man-made structure on Earth, after Burj Khalifa.