eso

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Note added at 2004-01-30 17:57:08 (GMT) [[utf-8]]
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also "blue helmets"

This depends on the country and the style of cap. In some places, they could be called Blue Berets, in others Blue Helmets, etc.

Pravda.RU On UN blue helmets in Georgia
16:12 2002-06-03 On UN blue helmets in Georgia. The presence of UN observers in the
area of the Georgian-Abkhazian conflict is "possible only together with the ...
english.pravda.ru/cis/2002/06/03/29625.html - 63k - Cached - More pages from this site
Keeping the Peace - Traveling with the UN blue helmets in Sierra ...
Keeping the Peace Traveling with the UN blue helmets in Sierra Leone and
Liberia. By Jessie Deeter Posted Friday, Dec. 26, 2003, at 10:39 AM PT. ...
slate.msn.com/id/2093103/ - 26k - Cached - More pages from this site
The Hindu : Annan rules out takeover by UN 'blue helmets'
... I have made it quite clear that UN blue helmets will not do that; we don't
have the capacity, and we would not.". "But it is not excluded. ...
www.hindu.com/thehindu/2003/08/23/stories/2003082310211300.... - 13k - Cached - More pages from this site

This is a unit of the UN peacekeeping forces.

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Note added at 3 mins (2004-01-30 17:58:30 GMT)
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http://www.freerepublic.com/forum/a7794.htm
http://www.globalpolicy.org/security/issues/ethiopia/001207....
http://www.suanews.com/articles/didyouknow/blueberets.htm

Aunque cuesta un poco, en la web de la propia ONU, si se busca entre sus notas de prensa, puede encontrarse específicamente la frase "blue helmet".
una muestra: http://www.un.org/News/Press/docs/2002/DSGSM175.doc.htm
aunque hay más