Here is a good website for links to anti-war organizations, Top 10 Things You Can Do to Stop the War in Iraq, and links for non-US citizens to join the protest at the United For Peace website:

http://www.unitedforpeace.org/

Some thoughts from the Thousand Cranes for Peace Network's website:

Establishing lasting peace is the work of education; all politics can do is keep us out of war.
Maria Montessori

If we do not change our direction we are likely to end up where we are headed.
Chinese Proverb

You must do the thing which you think you cannot do.
Eleanor Roosevelt

Nothing could be worse than the fear that one had given up too soon and left one unexpended effort which might have saved the world.
Jane Addams

No-one has the right to sit down and feel hopeless. There's too much work to do.
Dorothy Day

The one thing that doesn't abide by majority rule is a person's conscience.
Harper Lee

When the citizens of a state are morally weak, to demand that its government be morally strong, is nothing short of sheer stupidity.
Chitrabhanu

There is no right way to do a wrong thing.
Anonymous

When injustice becomes law, resistance becomes duty.
Bumper sticker

I dream of giving birth to a child who will ask: "Mother, what was war?"
Eve Merriam

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a joeclone