Thinkgood:

That's cuz all the NYC AM stations have their transmitters in your back yard!! [Linked Image]

Serioursly...for example if you take a trip out to Giants Stadium you will see the three towers that make up WEVD-1050 AM's array.

Since it's marshy water and open ground, it's perfect for AM.

The AM station's tower you seeis only half of the antenna. The other half is underground and consists of long copper radials, buried into the bog.

Thieves have been known to dig them up and sell the copper. This happened some decades ago to WCBS/WFAN's tower out on High Island, off the coast of The Bronx (here in New York).