The screening of airport passengers & their checked baggage is a critical component in securing our nation's commercial aviation system. This report incorporates results from a survey of 155 Federal Security Directors -- the ranking Transportation Security Admin. (TSA) authority responsible for the leadership & coordination of TSA security activities at the nation's commercial airports. This report addresses: (1) actions TSA has taken to enhance training for passenger & checked baggage screeners & screening supervisors, (2) how TSA ensures that screeners complete required training, & (3) actions TSA has taken to measure & enhance screener performance in detecting threat objects. Charts & tables.