Meet Up with the US Campaign at the Rally
Meet us at our table, which will be near the corner of 17th and Constitution, a little bit northwest of the World War II Memorial. The nearest metro stop is Smithsonian on the blue/orange lines, shown in the bottom right-hand corner of the map below. 
Here's a detailed map showing our table, just northwest of the World War II Memorial. Look for the US Campaign to End the Israeli Occupation banner at our table.