Posting is easy, but first check to see the rules for the particular source you are coming from... some require you do not excerpt any of the article, just a link, others like Front Page you can post the whole article.
Just to be certain, here is just a link. It says it is copyright 1963 by Truman, but it isn't from the Washington Post. At least it's their headache:
http://pvnm.com/hst