Secretary-General Kofi Annan (left, walking behind officers), is escorted by United Nations Security Officers to attend the observance of the first anniversary of the attack on the United Nations headquarters in Baghdad, in which 22 staff members lost their lives. (UN Photo #NICA 32448 by Jean-Marc Ferre)

Secretary-General Kofi Annan, addressing the gathering at Victoria Hall in Geneva, on the observance of the first anniversary of the attack on the United Nations headquarters in Baghdad, in which 22 United Nations staff members gave their lives in the service of the Organization. (UN Photo #NICA 32441 by Jean-Marc Ferre)

Louise Arbour, High Commissioner for Human Rights, attending the Geneva observance of the first anniversary of the attack on the United Nations headquarters in Baghdad. Deputy Secretary-General Louise Frechette (left) unveils a memorial plaque in honour of the fallen staff members at the observance of the first anniversary of the (UN Photo #NICA 32450 by Jean-Marc Ferre)

Barbara Hendricks sings in memory of the 22 United Nations staff members who lost their lives in the bombing of UN Headquarters in Baghdad a year ago toady. (UN Photo #NICA 32446 by Jean-Marc Ferre)

Gilberto Gil, Minister of Culture of Brazil and noted singer, singing in the Victoria Hall where today's observance was held. (UN Photo #NICA 32442 by Jean-Marc Ferre)

Secretary-General Kofi Annan (left) and Mrs. Nane Annan attending the observance in Geneva today. (UN Photo #NICA 32449 by Jean-Marc Ferre)

Two United Nations Security Officers stand beside a memorial plaque that was unveiled in memory of the 22 United Nations staff members who lost their lives in Baghdad, a year ago today. (UN Photo #NICA 32447 by Jean-Marc Ferre)

A close friend of a victim of the Baghdad bombing, attends the observance on the first anniversary of the attack, lighting a candle. (UN Photo #NICA 32443 by Evan Schneider)

Lighting a candle in memory of a staff member whose life was lost in Baghdad. (UN Photo #NICA 32440 by Jean-Marc Ferre)

Lighting a candle in memory of a staff member whose life was lost in Baghdad. (UN Photo #NICA 32444 by Jean-Marc Ferre)

Lighting a candle in memory of a staff member whose life was lost in Baghdad. (UN Photo #NICA 32445 by Jean-Marc Ferre)