This week, the mystery deepens as, in the days after MH370’s disappearance, the Malaysian authorities first deny, then confirm that their military radar detected the missing 777 as it turned back from its planned route to Beijing just a few seconds after it passed the final waypoint in Malaysian airspace. The plane reversed course, flew back over the Malayan Peninsula, then flew up the middle of the Malacca Strait toward the northwest before disappearing again over the Andaman Sea. Jeff and Andy discuss the difference between primary and secondary radar, and Jeff explains why the timing of the turnback struck him as suspicious.