I agree with what many have posted here, I am soooo very happy that W is our President and so very proud of him (and don't think many others, such as sKerry and Klintoon would have done this). I want him and his family and team to be safe (and keep that in my prayers daily).
This appears to be a Big Time screw-up, the SS is always right next to the Pres (except during formal photos, speeches, dinners, where they're always very close by). I don't get this and, while I don't want to read too much into it, I sure hope it wasn't a 'trial run' as some have mentioned. I heard on the news he's going to Europe soon - -any issues and protocol need to get corrected NOW!
Not to be an alarmist, but the SS can not prevent this type of action. They are always going to be vastly outnumbered on foreign soil and there has to be a level of trust between security details. The guy could have started "dropping" the Chileans, but that would hav eled to an international "incident."
-T