NYPD brass was part of a metro-area law enforcement delegation attending a counterterrorism and anti-Semitism training near the Gaza Strip when radical Islamic militants launched a deadly surprise attack on Israel this weekend, sources said. The 32-member group arrived in Israel on Thursday and were just 20 miles from the border when Hamas attacked Saturday, the sources said. They were forced to seek shelter until they were able to evacuate on Sunday, and could be home by Monday, according to the sources. The delegation included a half dozen Westchester County officials, among them a deputy chief investigator with District Attorney...