21.  Different government agencies have been preparing their own recommendations about what such a force should do and look like.

22.  Einstein first proposed such a force, or negative pressure produced by vacuum energy, to correct what he thought was a flaw in his relativity theory.

23.  Efforts at the United Nations to create such a force have failed.

24.  Einstein suggested the existence of such a force, but later rejected it.

25.  Few dispute the need for such a force.

26.  For the first time, Musharraf said that Pakistani armed forces would participate in such a force.

27.  He cautioned the leaders at the Pentagon on Thursday that such a force would have to be larger, and would take considerable time to assemble.

28.  He fears such a force could be used against his fighters.

29.  He stressed that he was not specifically calling for U.S. troops to take part in such a force.

30.  His request last week for such a force was rejected by Britain and France.