President Obama at Ground Zero<p> </p>President Barack Obama arrives to lay a wreath at the National Sept. 11 Memorial at Ground Zero in New York.May 5, 2011, 11:14 PM UTCBy Margaret Judson, Margaret JudsonThe president, accompanied by Police Commissioner Raymond Kelly, and others, meets with police officers and first responders at the First Precinct before visiting Ground Zero.President Obama and former New York City Mayor Rudy Giuliani meet with firefighters and first responders at Engine 54, Ladder 4, Battalion 9 before visiting the National 9/11 Memorial.President Obama, accompanied by a New York City Police officer, New York City Firefighter, and Port Authority officer, observes a moment of silence after placing a wreath beside the \"Survivor Tree\" (left) at the World Trade Center site.President Obama meets with New York Mayor Michael Bloomberg, New York Gov. Andrew Cuomo, and New Jersey Gov. Chris Christie, after a wreath laying ceremony at Ground Zero.