Randall wouldn't go on vacation right now. He negotiated quite some time until his boss agreed to send him into a war zone and he wants to make a difference.
Lix sometimes toys with the idea of joining a expedition to an exotic place, like the Amazonas or the South Polar region, and sometimes she is tired of being a war reporter, but she is an adrenaline junkie, so the mere idea of a relaxed vacation with no danger involved shocks her.