Today in History (1841) - U.S. President John Tyler vetoes a bill which called for the re-establishment of the Second Bank of the United States. Enraged Whig Party members riot outside the White House in the most violent demonstration on White House grounds in U.S. history. One hundred twenty five years later, the House Un-American Activities Committee begins investigations of Americans who have aided the Viet Cong with the intent of introducing legislation to make these activities illegal. Anti-war demonstrators disrupt the meeting and 50 people are arrested.