activist from palestine tweeted tips for dealing with tier gas. protesters risked arrest and violence. one local woman gave out water all day to protesters and that night police maced her. she said it felt like hell on fire. protesters in ferguson are extraordinary. the u.s. government doesn't even put a number on police killing. the fbi said the police commit 400 justifiable homicides a year. that number is way too low. the facebook page killed by police documented 1400 deaths spanning three people killed every single day. >> cspan: how do you do and i know going back and forth between politics and art. but how do you do that when you have a piece of work on your board and when you blacken it in? >> guest: i pour black ink on it. >> cspan: that is not saved? how do you know when you are getting through, or do you know when you are getting through to a public that is looking at what you do? >> guest: that is a really good and hard question. i mean just from the notes people write me or the conversation i see happening around it. when i am doing it