B25 MITCHELL STRIKES FIRE TRUCK WITH WINGTIP WHILE TAXIING FOR TKOF.

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I WAS PIC OF THE B25J MITCHELL BOMBER; TAXIING FOR TKOF TO PERFORM A SERIES OF LOW PASSES FOR THE AIR SHOW THAT WAS IN PROGRESS. WE WERE CLRED BY GND CTL TO TAXI TO RWY 35 VIA TXWY B. THE TXWY IS VERY NARROW; AND FURTHER OBSTRUCTED BY 2 LARGE FIRE TRUCKS. AT THE EDGE OF THE R SIDE OF THE TXWY WERE SEVERAL HUNDRED SPECTATORS; STANDING ON THE GRASS ON THE TXWY EDGE. THE FIRE TRUCKS WERE PARKED ON THE LEFT; OR EAST SIDE OF THE TXWY. I WAS TAXIING VERY SLOWLY; LESS THAN 5 KTS. MY ATTN WAS DIRECTED PRIMARILY TO THE R EDGE OF THE TXWY; WHERE THE SPECTATORS WERE. WHEN I GLANCED TO MY L; I REALIZED THAT THE FIRE TRUCKS WERE MUCH CLOSER THAN I HAD EXPECTED. I APPLIED THE BRAKES TO STOP THE ACFT; BUT WAS TOO LATE TO PREVENT THE L WINGTIP FROM IMPACTING THE R FRONT EYEBROW WINDOW OF THE TRUCK. WE STOPPED THE ACFT AND SHUT DOWN; IT WAS SUBSEQUENTLY TOWED TO A HANGAR. DAMAGE WAS AN 8 INCH X 1 INCH GOUGE IN THE L WINGTIP; AND A SMASHED NAV LIGHT. THE EYEBROW WINDOW OF THE FIRE TRUCK WAS CRACKED. IN RETROSPECT; I SHOULD HAVE STOPPED EARLIER AND INSISTED ON WING WALKERS ON BOTH SIDES OF THE AIRPLANE. I WAS TOO INTENT ON THE LARGE CROWD TO THE EXCLUSION OF 2 VERY LARGE FIRE TRUCKS WHICH HAD NARROWED AN ALREADY NARROW TXWY EVEN FURTHER.