Originally Posted by
atsiang
I find it difficult to believe that it's merely random. My parents got TSA Pre both ways flying SJC to SAN.
Since the program's inception, there have been only 3 ways a passenger can get TSA Precheck - Random, Airline (eliminated), and Enrollment. Since this is not the case of enrollment, random is the only explanation.
FWIW - just because it is "random" does not really mean the chance is really random.