Security concerns at the nation's ports, heightened by a security breach and a cyberattack this year at the Port of Los Angeles, will be the focus of a hearing by a congressional committee Monday in San Pedro. Members of the House Committee on Homeland Security will take testimony from officials of the L.A. and Long Beach ports, the Trump administration and longshore union starting at 1:30 p.m. at the Port of L.A. Harbor Administration Building.