Following on from my last post, Rachel Aspden’s blog included a detail which set off an interesting, if virtual, mission of my own. Her account of Tahrir Square on 22 November mentioned that at least some of gas canisters being fired there carry blue ‘Made in U.S.A.’ stamps and are manufactured by a Jamestown, Pennsylvania-based company. Curiosity led me to a recently posted twitpic of a similar shell here, to Combined Tactical Systems Inc.’s website, and thence to a blogpost for the London Review of Books.