Here is another article on the low-flying planes, posted today:

Slow Saturday Special: Quincy Has Questions

This week’s lightning and rain has brought some relief, but Quincy residents worry that the drone of small planes flying
overhead will soon return.

Residents say that since late April, they have suffered from the sound of low-flying planes, which are making continuous
loops above their homes through the day and night. And government officials will not say who is flying the planes or why.

“It was every six minutes this loop would take, and it’s doing this arch,” said Michael Gundersen, who lives in
Wollaston. “But when it’s doing a turn, it would get louder, every six minutes for hours on end.”

Read more:
[link to rockthetruth2.blogspot.com]