Definition of "personal use"
One makes a copy and keep it in one's file. Maybe one emails it to a couple of friends, a private-channel distribution.
One does not post it on the internet for the personal use of potentially millions of people.
Unless Knight-Ridder has explicitly said that this article is in the public domain, and its author (whose intellectual property it is) agrees, it is not. What it is is published. Not the same thing. Sorry.