That wasn't about resident safety, it was about a moral position against war. IIRC, those went up in the 80s when residents wanted to ensure that Lawrence Berke

That wasn't about resident safety, it was about a moral position against war. IIRC, those went up in the 80s when residents wanted to ensure that Lawrence Berkeley National Laboratory couldn't legally do the kind of weapons-directed research that Lawrence Livermore National Laboratory did.