The Roswell Crash of 1947...

http://en.wikipedia.org/wiki/Roswell_UFO_incident#Growing_interest
Some advanced form of technology crashes in July 1947.
http://www.roswellfiles.com/story.htm
Perhaps its from another world or another dimensional plane of existence, or even from another point in time.
http://www.roswellufomuseum.com/incident.html
Small beings are found in & around the ship.
The official story can't allow for such possibilities, because too many people would ask too many questions.
http://www.ufoevidence.org/documents/doc384.htm
Various stories are developed so it becomes difficult to know what actually happened there in 1947.
http://www.dailymail.co.uk/news/article-1375203/The-memo-proves-aliens-landed-Roswell--released-online-FBI.html
The official line is that there can't be any extraterrestrial or multi-dimensional beings out there that are visiting the earth.
http://www.dailymail.co.uk/news/article-2184586/Roswell-incident-There-TWO-UFO-crashes-Roswell-says-Air-Force-official.html

The website crystalinks.com provides some interesting images & articles on this matter.

http://www.crystalinks.com/roswell.html

Then 2 decades later, a British TV movie depicts the discovery of a small spaceship containing some ancient dead creatures. http://en.wikipedia.org/wiki/Quatermass_and_the_Pit_(film)#Production ,
http://www.dailymotion.com/video/xet3jh_quatermass-and-the-pit-movie-versio_shortfilms

http://www.scifi-movies.com/english/photo-0001621-2-quatermass-and-the-pit-1967.htm ,

http://www.cathoderaytube.co.uk/2011/09/quatermass-and-pit-blu-ray-review-and.html ,
http://www.imdb.com/media/rm2551955712/tt0062168?ref_=ttmi_mi_all_sf_4 ,
http://projectswordtoys.blogspot.ca/2011/11/knightsbridge-apemen.html ,
http://sonofcelluloid.blogspot.ca/2011/09/quatermass-and-pit-1967.html
A fascinating depiction of ancient intelligent insects.

http://sfforward.blogspot.ca/2013/07/life-in-wax-teaching-collections-at.html

http://fadedvideolabels.blogspot.ca/2011/08/quatermass-pit-1967.html

http://www.blu-raydefinition.com/reviews/quatermass-and-the-pit-uk-release-blu-ray-review.html

Hob's Lane & the Beelzebub crew.
http://www.dailymotion.com/video/xet3sk_quatermass-and-the-pit-movie-versio_shortfilms

"Beelzebub as depicted in Collin de Plancy'sDictionnaire Infernal(Paris, 1863)."
http://en.wikipedia.org/wiki/Beelzebub#Christian_demonology_and_occult

http://en.wikipedia.org/wiki/Dictionnaire_Infernal#List_of_demons

http://www.alienresistance.org/the-1947-roswell-ufo-crash

http://en.wikipedia.org/wiki/Close_Encounters_of_the_Third_Kind#Filming ,
http://en.wikipedia.org/wiki/Devils_Tower#Recent_history

http://syncnotes.blogspot.ca/2014/10/hobs-lane-quatermass-and-pit-or-five.html