You just may be in for some brain injury! Wikipedia copyright issues are not easy to deal with because they computer search the internet for violations – no humans involved.
A few years ago, I built a website for a museum that housed an antique Southern Pacific Railroad Rotary Snow Blower. At the same time, I built an accompanying Wikipedia page. I took an image of the Snow Blower with my own camera, and used the same image on both the webpage and the Wikipedia page. In the metadata of the webpage, I listed myself as the copyright holder.
It seems that the Wikipedia computer had no way to tell who owned the copyright, just that it was copyrighted somewhere else. The fact that the footnotes of the Wikipedia page documented all of the copyright facts, their search computer created chaos. This took months to straighten out, and was finally resolved when a human finally became involved.
As Michael said above, check the copyright status of the specific material you want to use. This is normally found in the footnotes of the Wikipedia page. My experience has been that most decent material will require attribution.