Relatives of September 11 victims have gathered to remember their loved ones, on the fourth anniversary of the terror attacks.More than 2,700 people perished when hijacked planes struck the World Trade Center in New York. Tribute was paid to the victims in an emotional ceremony at the site of the tragedy. It comes as the US deals with the horrific consequences of Hurricane Katrina. In his speech, New York Mayor Michael Bloomberg spared a thought for those struck by that natural disaster – as well as for the victims of more recent terror attacks across the Atlantic. “Today as we recite the names of those we lost, our hearts turn as well towards London, our sister city, remembering those she has just lost as well, and to Americans, suffering in the aftermath of Katrina,” he said. “Our deepest sympathies go out to you this day.” In this year’s commemoration, grieving brothers and sisters assembled at Ground Zero and read out the names of their siblings. Controversy over reconstruction work at the site was put aside for the day. Two further suicide plane crashes happened on US soil on September 11 2001 – one at the Pentagon in Washington, another in a field in Pennsylvania.