I flew out of FRA yesterday enroute to IAD. After going through security, I went into the RCC. Soon there was an anouncement that all passangers must vacate the RRC and again go through a security check. Fortunately, I was third in line because soon the line had become quite long. Apparently all passangers forward of the security check had to return and go through once more. Of course we all stood there waiting for the process to begin, but before anyone could be screened the toilets and all areas had to be cleared. Again I returned to the RCC and asked if this happened often. The reply was, "Yes, it's something new every day". When the flight was called, I went to the gate for a third security check. Again a long line which caused a thirty minute delay in the flight's departure. I like to feel secure, but is this security overkill ?