According to Washington, who was responsible for the institution of slavery?

answer:

Despite having been an active slave holder for 56 years, George Washington struggled with the institution of slavery and spoke frequently of his desire to end the practice. At the end of his life, Washington made the decision to free all his slaves in his 1799 will - the only slave-holding Founding Father to do so.

an early twentieth-century ad for model home blueprints

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.