Yes Dave, pics can be attached directly to a post.
Click on "Attachments and other options" below the dialogue box, which opens the "Attach" option. Click on "Browse", then find the pic you want to attach, click on it, and then click the "Open" button. The name of the selected pic will appear to the right of the "Browse" button. To attach more pics in the same post, click on "(more attachments)", which opens another "Browse" box.