As a young boy one of my chores was to set the trash out for collection on Sunday and Wednesday evenings for pickup the next morning.

On a fall Sunday evening I was walking back to the house after completing this job with my dog.  About halfway to the house the dog starting barking for no apparent reason.  
When I looked up and to the west, I saw three round blue-white disks in V formation moving from SE to NW.  This would have been very near the Glen L Martin Co or Martin Maretta, as it is known now.  There was no sound and the disks did not change course but moved steadily until they were out of sight.
I cannot be certain of the exact year but I would think this occurred between 1954 and 1958.  That this event has remained with me all these years seems remarkable.
(
Witness indicates that the date of the incident is approximate.  PD))