explored the Louisiana Purchase

killed the US Bank

The Waltham System which was part of the textile mills in New England, employed young unmarried girls who were never considered to be a permanent part of the work force was originally a good way for these young women to earn money. However, by the late 1830s and 1840s,  the employment of young women in the textile industry in the Northeast became abusive in terms of the hours and working conditions that these girls were subjected to.

Lincoln wanted Reconstruction to be punitive and harsh

Aaron Burr attempted to carve out an empire for himself in North America, was charged with treason and was convicted

PATHOLOGY A 75 year old male presents with a history of syncope and collapse.  The septal wall measures 17 mm, the posterior wall measures 8 mm.  Moderate mitral regurgitation is present.  Upon zooming up on the aortic and mitral valves, the anterior mitral valve leaflet appears to touch the septum during systole.  What is the most likely diagnosis?

invaded the US during the War of 1812 and torched many buildings in Washington, D.C.

What size of pericardial effusion do we see in the following image?  

the first capital of the United States was in

father of the Eerie Canal