Pics of knapweed and pulls in the past

If you notice in the foreground, there is a knapweed that we didn't even know was there yet. Michael S and I were taking photos of Western Salisfy and were oblivious to the fact that a knapweed grew just feet away.
Other photos are of the young seedling and Jamie and Jeannie Standley at the fall creek knapweed site. Notice the retaining wall in relation to the railroad tracks. We need to get rid of this infestation.