Does anyone know what movie Chuck Norris was promoting at the 1975 Comic-Con?

[mpm74]

It couldn't be Breaker, Breaker (1977), and it definitely couldn't be Slaughter in San Fran!

[OpiumKungFuCracker]

Antibiotics for headaches???

[ShaOW!linDude]

Looking at his filmography on Wikipedia and according to it, there was a documentary he appeared in titled The Warrior Within that came out in 1976. Maybe it was for that.