On March 20, President Roosevelt ordered all the men in Rosenthal's photograph be sent to Washington D.C. after the battle was over. Pfc. Gagnon arrived alone on April 7 and was questioned at Marine Headquarters by a public information officer about the identities of the six flag raisers. Pfc. Gagnon identified Navy corpsman John Bradley and Pfc. Ira Hayes as flag raisers in the photograph and they were sent for and arrived on April 19 and, they were separately questioned that day (Sgt. Strank, Cpl. Block, and Pfc. Sousley were killed on Iwo Jima). All three said they were in the photograph and raised the flag; on April 8, they had been named publicly by the Marine Corps as the surviving flag raisers. Over time it was discovered that all of the second flag-raisers were Marines and that three of the six Marines in Rosenthal's photograph were not correctly identified: Cpl. Block was not recognized until January 1947, Pfc. Schultz was not recognized until June 2016, and Pfc. Keller was not recognized until October 2019. Cpl. Block was incorrectly identified in the photograph as Henry Hansen. Pfc. Schultz was identified as Pfc. Sousley in the photograph. In turn, Pfc. Sousley was identified as PhM2c. Bradley in the photograph. Pfc. Keller was incorrectly identified as Pfc. Gagnon in the photograph. Rosenthal did not take the names of any of the flag raisers in his photograph. Pfc. Schultz and Pfc. Keller did not ever claim publicly to be in Rosenthal's photograph or that they were flag-raisers.