Maryanne Garry and Matthew P. Gerrie show that memories can be altered by photographs, creating false memories, in their "false-memory implantation" research (Garry & Gerrie, 2005).
Garry, Maryanne & Gerrie, Matthew P. (2005) When Photographs Create False Memories [Online]
http://cdp.sagepub.com/content/14/6/321.abstract [16/04/2012]