(Portland, OR)  --  TriMet says it's upgrading transit security in response to the MAX train attacks that left two men dead and another injured.  The agency says it will temporarily add up to 15 contract security officers in the coming days.  TriMet also intends to speed up the permanent hires of transit police that were included in the newly adopted budget for fiscal year 2018.  TriMet currently has 61 Transit Police officers and 15 contracted security guards.