On 5 February 2003 a large blue curtain was placed to cover this work at the UN .
Curtain would not be visible in the background when Colin Powell and John Negroponte gave press conferences at the UN   .
On 5 February 2003 a large blue curtain was placed to cover this work at the UN , so that it would not be visible in the background when Colin Powell and John Negroponte gave press conferences at the United Nations .