A new distinctive feature of the Dallas skyline is the riveting Margaret Hunt Hill Bridge that could actually be a bridge to urban renewal. Also, listen in on a conversation between two hands-on thought leaders about grass roots efforts to revive the heartbeat of Dallas’ communities. And read about how Texas politics lives up to the notion for professionals that “If you’re not at the table, you’re on the menu.” … All this and more in the new Spring 2012 issue of the award-winning ‘Columns’ magazine. [Advertise by contacting Celi Sims, 214.742.3242 or csims@aiadallas.org.]