When leaving the victim's house the second time, Gibbs puts away his notebook twice in succession.
Carabiners (a.k.a. biners) are constantly referred to as "dee-links".
66-3T6 is not an actual type of aluminum. 6061-T6 and 6061-T3 are. The dash T+number denotes the hardness temper of the material. The number proceeding the dash describes the chemical composition of the aluminum, and is always four numbers. (e.g. 2024, 3035, 6061, 7075, etc).
From 0:42- several scenes show the SEALs rappelling with slack anchor lines. These scenes are computer generated.
Abby pronounces "espresso" with an "x".