A portal was set up in downtown D.C. earlier this year. (Photo by Rachel Sadon) There was a long waiting list earlier this summer to visit the gilded shipping container that materialized in downtown D.C. Conceived by D.C.-based artist Amar Bakshi, the “Portals” project connected visitors in Washington to strangers in Cuba, Iran, and Afghanistan solely for the purpose of having a 20-minute chat. Now, Bakshi is bringing the project back to the area…