The Pensacola Naval Air Station following a shooting on December 6, 2019 in Pensacola, Florida. TJosh Brasted/Getty Images/AFP 
The Pensacola Naval Air Station following a shooting on December 6, 2019 in Pensacola, Florida. TJosh Brasted/Getty Images/AFP 

Pensacola killer may have been radicalised two years before he reached US