This mission will task you with collecting five journal ECHOs that will reveal more about Handsome Jack. All five will be in the two Arid Nexus areas, with two being in Badlands and the other three being in Boneyard. All of them are pretty easy to get to, but you want to be careful about going out of bounds with the one in the south in Boneyard.

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Pull the switch (left) to make a Rakk fly off with the ECHO, so you'll need to shoot it down to retrieve it (right).

The only one that needs anything different done is the one on the windmill. There’s a switch on the tank right next to it that will trigger some Rakk to fly off; one of these Rakk will have the ECHO, so you will need to kill that particular Rakk in order to get the ECHO. Once you have retrieved all five of them, the mission will be over.