FILE - In this Nov. 12, 2013 file photo, a Transportation Security Administration officer stands in front of a portrait of slain TSA officer Gerardo Hernandez during his public memorial at the Los Angeles Sports Arena. A shooter who gunned down airport screening officers three years ago at Los Angeles International Airport in a terrifying attack that sent frantic passengers running for their lives is scheduled to plead guilty Tuesday, Sept. 6, 2016, to murder and other counts. Paul Ciancia agreed last week to plead guilty to all 11 charges in the rampage that killed one officer and wounded two others and a teacher who was headed for a flight. (Al Seib/Los Angeles Times via AP, Pool, File)
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