In your pic of the yellow and black "Amnistia" signs, the word "ANSWER" is carefully obscured by cropping and blurred focus (I'm blaming the AP, not you, of course). But as you may have seen from the pic I posted up thread, rest assured that those signs have "ANSWER" printed in prominent letters in the bottom left-hand corner.
They can try and hide or fog-over the signs in every which way possible but they're out there in quite few shots and at quite a few locations, it appears. ;-)
Where do commie anti-American groups like ANSWER get all the money to print all these signs and bus paid protesters in from? These are obviously not spontaneous rallies. I read an article about some general over in Iraq who put the Kabosh on some planned "spontaneous" rallies by leasing out all the buses in the area during the day the rallies were planned so that the protesters wouldn't have any buses available to go to the "spontaneous" protests.
All these protests took some serious dinero and mucho planning. This needs to be looked into.