According to Hadith Sahih
Volume 2, Book 23, Number 413:
The Jew brought to the Prophet a man and a woman from amongst them who have committed (adultery) illegal sexual intercourse. He ordered both of them to be stoned (to death), near the place of offering the funeral prayers beside the mosque."
Here is a list of many more examples of Sharia Law in action: http://www.religioustolerance.org/isl_adul1.htm
I hope this helps people understand why a religion like this should not be allowed in the United States and in any civilized country, let alone build mosques in New York and in other places.