Oak trees grow from small acorns -- and it seems Cindy Sheehan's protest is having a similar effect among anti-war activists in the US.

Sheehan's campaign has only picked up patchy coverage here in Britain -- but it has been all over the American media.

Sheehan's son Casey was killed in Iraq in April 2004. She has now set up camp outside President Bush's ranch in Texas and says she's prepared to stay there for the duration of his vacation until she is granted an opportunity to speak to him.

What started as a solitary protest seems to be gathering an unstoppable momentum.

Several hundred people have now gathered at what has been dubbed "Camp Casey" to call on President Bush to withdraw US troops from Iraq.

Among those heading to Crawford to join the campaign is a friend of this blog, Lynn Bradach from Portland, Oregon.

Lynn's son Travis was killed while clearing land mines near Karbala in 2003.

Lynn will spend a week in Crawford and I'll be keeping an eye on her progress.