Invitation-Only Articles on Worldisround

Invitations: Invitation-only articles can only be viewed by the author and by people that they e-mail the article to. When the author of an invitation-only article uses the E-mail this article/photo feature to e-mail the article to someone else, an invitation is included in the URL in that e-mail. The recipient must use that special URL in order to view the article.
Since e-mailing an invitation-only article is the same as handing out the invitation, only the author can e-mail the article to others. Friends, even with an invitation to view the article, are not allowed to e-mail the article to anyone else
Travel Articles: Travel articles are always public and cannot be invitation-only.