“remnants of ravioli” just sounds too silly to be any bomb...
http://www.post-gazette.com:80/pg/10123/1055136-53.stm?cmpid=relatedarticle
Thanks the OlLine Rebel.
Click this link. http://www.post-gazette.com:80/pg/10123/1055136-53.stm?cmpid=relatedarticle