After the cancellation of the CF-105 in 1958, the RCAF ended up purchasing the F-101, a design which they had originally rejected, and which was less capable than the CF-105. Assuming the Arrow still gets cancelled as in OTL, what other aircraft could the RCAF have purchased to fill the role? Personally, I think that if it could have been worked out, buying F-106s would have been a good idea.