The title reads as if the 48 agents took 72 hours to find this. The text doesn't exactly say that:

> "It took less than 72 hours to go from a random thought while traveling to an official reply from the Mexican government."

> "That night, I asked the agents to analyze it and went to bed." ... "I woke up and checked the agents' reports. 'DAMN!'"

> "Me: OK, please do the report. And I went to bed."

(The actual agents-on-the-job time and compute seems much less than 48 agents * 72hours from the report.)