We check this website, now peacecorps.gov is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is peacecorps Down Right Now? - NO! peacecorps is up!
If you have problem with access to site peacecorps, and domain peacecorps.gov is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).