It seems that ATAC may have stopped flying the various versions of the A-4 SkyHawk which they flew for many years. I hate to see the end of SkyHawk flying as it was a wonderful jet.
Here are two different promotional videos from the company posted on YouTube. They use a lot of the same footage, but I enjoy the clips. In the first one you see some quick shots of the A-4Ns they flew. In the second, you'll see they don't mention/show the A-4s at all and instead show a picture of the newly acquired L-39s.
ATAC Tailhook Video - YouTube
ATAC Adversary - YouTube