Story Links: Muto graffiti animation in Buenos Aires by BLU , Rocketboom field correspondent Jacob Soboroff of Why Tuesday? on today's mail-in primary voting , Study on trust in the US federal government , German speaking Rocketboom field correspondent /SMS ;) speaks with riz khan of Al Jazeera at the St. Gallen Symposium , Aluminum , Shrubbery Camouflage Helmet , Number of horns on a unicorn multiplied by the answer to life, the universe and everything furlongs , How many cannibals can your body feed quiz , Study links cell phone use near children with hyperactivity and other behavioral problems