Each week we scour the web for interesting and historic documents that catch our eye, make us think or simply make us laugh.

Photo Title: Two men examining kit of dynamite and wire found during sabotage incidents of Owens Valley Aqueduct, Calif., circa 1924. Photo Credit: Los Angeles Times photographic archive, UCLA Library. Copyright Regents of the University of California, UCLA Library.

This post first appeared on AHA Today.