Early 1960's South New Jersey Large circular craft, zig-zag movement, visable more than 20 minutes.

I have no recollection of what year, am only guessing.  it was in the fall, as the evening was warm but it was getting darker earlier in the day.
 I was in my early teens and had cut my foot and went to the hospital for stitches.  upon leaving the hospital, two men standing near the exit were talking and one said, "wait, I'll come back"  They were looking up in the air, I looked up to see what they were looking for, but did not see anything.
 My brother (3 years older than I) had accompanied my father and myself to the hospital and also was looking to see what the guys were talking about.
 when we got home, about 1/2 mile for the hospital, we could easily see a very large circular craft, saucer shaped moving in a zig-zag pattern.  My brother ran to his friends house about 6 houses away and told his friend about it.  They both attempted to take many photos of the object.
 They had told many people on our block about it and there were around 20 people who were watching the object.
 My Brother and his friend were both in the photography club in the high school and of the 2 rolls of film they tried to take, not one picture came out.
 The craft itself had rows of lights that spun slowly in opposite directions.
Date is approximate.  PD