Zorglub

That particular Delta was different to most of the others as it had a larger vertical tail, it was ordered by the Royal Canadian Air Force as RCAF 685 and later became A-149 as an instructional airframe. It is an impressive looking thing especially with the modified fin.
See here http://www.rwrwalker.ca/RCAF_651_700_detailed.htm
And here http://www.rwrwalker.ca/Inst_1.htm

Richard