Speaker John Boehner (R-Ohio) and other House Republicans are coming under increasing pressure to create a special investigative panel ahead of the one-year anniversary of the Benghazi terror attacks.

A group of special forces veterans has spent $5,800 for three giant billboards scheduled to go up in Boehner’s district this week. And another conservative group plans to hold a day-long commemoration at the steps of the Capitol on Sept. 11.

“If 4 Members of Congress were KILLED in Benghazi would we have a Watergate-style Select Committee today?” ask the billboards, which feature photos of Boehner, House Minority Leader Nancy Pelosi (D-Calif.), Senate Majority leader Harry Reid (D-Nev.) and Senate Minority leader Mitch McConnell (R-Ky.). “Demand Justice for Benghazi.”