14 December 1941
(Milwaukee Sentinel, Wisconsin)
The whole article:
“ ‘An unidentified dirigible’ was sighted off the Atlantic Coast last night by a naval vessel, causing blackouts to be put into effect at the naval operating base and Norfolk navy yard, it was announced today at the Fifth naval district public relations office.
No further information regarding the dirigible was released by the navy, although it was reported that at the yard whistles were blown to warn workmen of the impending blackout. A siren was placed in operation at the yard today.”
Satellite photo of Norfolk, Virginia(tageo.com)