The youth choir belted out “O Happy Day” as folks trickled in through the church doors. Few noticed the accountant sitting in the back pew, his eyes flickering over each latecomer. In one hand, he held a Bible. In the other, tucked inside his coat pocket, he gripped a .38 caliber revolver. …Sanctuaries that once left their doors open all day now employ armed guards, off-duty police officers, surveillance cameras and even undercover plainclothes guards who mingle with the congregation.
