Board Thread:Fun and Games Forum/@comment-1524575-20170111071838/@comment-24510587-20170217084351

It struck Solis as odd that they hadn't come across any Vex yet, though he kept it to himself. He would have expected the most advanced network of intelligence in the universe to be capable of remembering to defend side entrances.

Then again, it might all just be appearance. For all the Guardians knew, the Vex might be observing them right now, and letting them walk straight into a death trap.