(October 23, 2015, 1:51 PM EDT) -- ST. LOUIS — The attorneys representing Missouri residents who contend that they have been harmed as a result of exposure to radioactive material related to the Manhattan Engineering Project near the St. Louis Airport on Oct. 21 filed a joint status report stating that as many as 300 more plaintiffs may join the litigation (Scott D. McClurg, et al. v. MI Holdings Inc., et al., No. 12-361 [consolidated], E.D. Mo.)....