Notice ‘militia’ in Second Amendment

The Second Amendment to the United States Constitution states that:

“A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed.”

In all the “right to bear arms” arguments I have read and heard and in all the pro- and anti-gun control discussions, I haven’t seen or heard anything about the “militia” part. I must have missed Congress’ having deleted “militia” from the Second Amendment. When did that happen?

James H. Schultz

Hines