NESCONSET - A memorial park will be built in Nesconset in tribute to the more than 1,000 Sept. 11 first responders who died after being exposed to the toxic dust at Ground Zero. Greta Helmke, of Hauppauge, and Jennifer McNamara, of Blue Point, lost their husbands, a police officer and a firefighter, to cancer. Both women feared their loved ones' sacrifice would be forgotten. But now, the 9/11 Responders Remembered Park will be the first memorial in the country honoring those who died after working at Ground Zero.The park will feature a wall with the names of fallen first responders etched in stone.A clock tower will chime in remembrance.Organizers need to raise $50,000 to build the memorial. They're hoping Long Islanders will help by participating in a walkathon and groundbreaking fundraiser, which will be held in Nesconset April 3.The memorial is expected to be unveiled in time for the 10th anniversary of Sept. 11. 9/11 Responders Remembered Committee