Today in History: July 20

Today is Wednesday, July 20, the 202nd day of 2016. There are 164 days left in the year.
Today’s Highlight in History:
On July 20, 1976, America’s Viking 1 robot spacecraft made a successful, first-ever landing on Mars.
On this date:
In 1861, the Congress of the Confederate States convened in Richmond, Virginia.
In 1871, British Columbia entered Confederation as a Canadian province.
In 1917, the World War I draft lottery went into operation.
In 1923, Mexican revolutionary leader Panc