via Body and Soul:
To be honest, I treat the actual witness account as more valid. After all, this happens every day with innocent Palestinians, the only difference here is that Corrie was an American. It's clear from the eyewitness account that she was killed deliberately, in full view. Palestinian terrorists are not alone in demonstrating a clear pattern of reckless disregard for human life (and Palestinian civilians are not alone in valuing it all the more highly for the constant threat it faces).
Jeanne D'Arc has more on this in her posts: here, and here. Also Barry of Amptoons has a long and thoughtful post on the subject as well.
But the most important thing about Rachel Corrie's presence in Gaza, is what she said herself:
I am asking people who care about me-- or just have some passing interest in me--to use my presence in occupied Palestine as a reason to actively search for information about the Israeli-Palestinian conflict, and of course particularly about the role of the United States in perpetuating it. I am here because I recognize that as a citizen of the United States I have some responsibility for what is happening here. I'm also here because I need to see for myself.
UPDATE: From Electronic Intifada, comes photos before and after Corrie's death. It's clear from the photos that Corrie was highly visible, carrying a megaphone, wearing a bright red jacket. Here are more eyewitness accounts, and also this story detailing how Rachel Corrie's memorial service was interrupted by another bulldozer sent by the IDF.
and here's one more quote from Corrie, because she really deserves the last word:
I spent a lot of time writing about the disappointment of discovering, somewhat first-hand, the degree of evil of which we are still capable. I should at least mention that I am also discovering a degree of strength and of basic ability for humans to remain human in the direst of circumstances - which I also haven't seen before. I think the word is dignity.