Several SSL certificates controlled by the US Government expired today and are still being used — for example, the SSL certificates used on both
ui.tn.gov and
webmail.coop-uspto.gov have expired and may not be replaced any time soon. Furthermore, there are at least 30 US Government sites still using SSL certificates that are scheduled to expire before Friday.
SSL certificates expiring may be least of the problems for US Government websites, some websites have been taken offline:
www.nasa.gov now redirects to
notice.usa.gov.