This was published 10 months ago but is worth a read, wrt Daallo Airlines Flight 159, etc:
The Evolving Challenges for Explosive Detection in the Aviation Sector and Beyond
https://www.ctc.usma.edu/posts/the-e...tor-and-beyond
Published by Combating Terrorism Center, West Point, NY
May 19, 2016
Author(s): Robert Liscouski, William McGann