Events
1776 - North Carolina 's Provincial Congress authorized its delegates to the Second Continental Congress to vote for independence by issuing the Halifax Resolves .
1861 - American Civil War : The war begins with Confederate forces firing on Fort Sumter , in the harbor of Charleston, South Carolina .
1864 - American Civil War : Fort Pillow massacre -- Confederate forces under General Nathan Bedford Forrest kill most of the African American soldiers who had surrendered at Fort Pillow , Tennessee .
1865 - American Civil War : Mobile, Alabama , falls to the Union Army .
1934 - The strongest surface wind gust in the world, 231 mph, was measured by the staff of the Mount Washington Observatory on the summit of Mount Washington
1934 - The Auto-Lite Strike , which culminated in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers, began.
1945 - President Franklin D. Roosevelt dies while in office; vice-president Harry S. Truman is sworn in as the 33rd President of the United States .
1955 - The polio vaccine , developed by Dr. Jonas Salk , is declared safe and effective.
1968 - Nerve gas accident at Skull Valley , Utah .
Columbia launching during STS-1 .