Left, Pope Francis passes a crucifix as he walks down steps during his general audience in St. Peter's Square at the Vatican Dec. 4. Photo by Paul Haring, courtesy of Catholic New Service. Right, President Barack Obama talks with President Hassan Rouhani of Iran during a phone call in the Oval Office, Sept. 27, 2013. (Official White House Photo by Pete Souza)

Left, Pope Francis passes a crucifix as he walks down steps during his general audience in St. Peter’s Square at the Vatican Dec. 4. Photo by Paul Haring, courtesy of Catholic New Service. Right, President Barack Obama talks with President Hassan Rouhani of Iran during a phone call in the Oval Office, Sept. 27, 2013. (Official White House Photo by Pete Souza)