http://information-machine.blogspot.ca/2014/03/wolfgang-halbig-threatened-for.html
http://projectavalon.net/forum4/showthread.php?68459-School-Safety-Expert---Wolfgang-W.-Halbig-Threatened-for-Questioning-Sandy-Hook
http://americanfreepress.net/?p=15503, http://americanfreepress.net/?p=15860
http://www.federaljack.com/school-safety-expert-threatened-for-questioning-sandy-hook
http://www.globalresearch.ca/school-shooting-expert-threatened-over-sandy-hook-investigation-was-told-if-he-didnt-back-off-bad-things-are-going-to-happen/5369574
http://www.infowars.com/school-shooting-expert-threatened-over-sandy-hook-investigation/
http://northerntruthseeker.blogspot.ca/2014/02/sandy-hook-exposer-wolfgang-halbig.html
https://www.google.ca/search?q=Wolfgang+Halbig%3A++Sandy+Hook&oq=Wolfgang+Halbig%3A++Sandy+Hook&aqs=chrome..69i57.8797j0j7&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8