NMAC. ACR FK-100 AND A FORMATION FLT OF 2 F-15'S. POP UP TFC. NORAC TFC.

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FLT FROM CLT TO FAY IN CRUISE AT 15000 FT AT LILLS INTXN V296. ZDC ADVISED TFC AT 1200 FT LOW; OPPOSITE DIRECTION; 14500 FT ABOUT 5 MI. NO TCASII RETURN UNTIL 3 MI. FIRST TCASII RETURN WAS A RA 'CLB; CLB NOW.' WE HAD NOT ESTABLISHED VISUAL AT THIS POINT SO I DISCONNECTED THE AUTOPLT AND IMMEDIATELY BEGAN CLB TO COMPLY WITH RA. AT 15300 FT IN THE CLB; FO STATED 'THERE'S 2! 1 ABOVE US!' I IMMEDIATELY STOPPED CLB TO AVOID SECOND ACFT VISUALLY. THEY WERE GONE AS FAST AS THEY APPEARED -- 2 F15'S -- 1 XPONDER; AT DIFFERENT ALTS; R ON THE LILLS DEP TRANSITION FROM CLT AND V296 ARR RTE TO FAY. FO STATED THE F15'S APPEARED TO BE IN AFTERBURNER; IN ANY CASE THEY WERE SO FAST WE WERE LUCKY TO SEE AND AVOID THE NON-XPONDER ACFT. ZDC WAS ADVISED OF THE SIT AND COMPLIANCE WITH RA. THEY APOLOGIZED FOR NOT GIVING A VECTOR BUT SAID THE ACFT JUST 'POPPED UP' FAST MOVING AND THAT HE 'WAS NOT TALKING TO THEM. MAYBE ATL WAS!' SHOULDN'T THESE GUYS BE AT THE SAME ALT IF THEY'RE USING ONLY 1 XPONDER? MAYBE THEY COULD ALSO BE TALKING TO SOMEONE WHEN ON A VICTOR AIRWAY -- EVEN VFR THEY AREN'T EXACTLY LIKE SPOTTING A CESSNA WHEN THEY'RE MOVING SO FAST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR CALLED BACK AND STATED THAT THE ZDC CTLR THOUGHT THE F-15'S CAME FROM POPE AFB. THEY WERE NOT NEAR ANY MOA'S THAT HE COULD DETERMINE BUT WERE ON A VICTOR AIRWAY. THE FLT HAD BEEN IN PROGRESS FROM CLT TO FAY; NC. THE CTLR ADDED; THAT IN RETROSPECT; HE SHOULD BUT THERE WAS JUST A SHORT TIME AS THIS WAS POP UP TFC AND HE WAS NOT COMMUNICATING WITH THE MIL ACFT.