In this week’s FOIA round-up, an email exchange between two White House officials and National Aeronautics and Space Administration head Jim Ridenstine show the administration asked NASA to “systematically sidestep” the “nonsense” of man-made climate change, documents reveal that Mexico had already planned immigration concessions months before tariff threat, and records show Chicago Police sergeant under investgation for alleged sexual assault had previously been reccomended for firing are investigating a transgender woman’s sexual assault claim against one of their own sergents.

We spoke with experts around the country for advice on using the Freedom of Information Act to dig into military contracts. Here are their top tips.