S.1891 - Federal Government - A bill to provide limited immunity for reports of suspected terrorist activity or suspicious behavior and response.

Grants immunity from civil liability to: (1) persons who, in good faith and based on an objectively reasonable suspicion, report suspicious activity involving or directed against a passenger transportation system, a threat to such system or to passenger safety or security, or an act of terrorism; and (2) passenger transportation security system employees or agents and other federal employees with transportation security responsibilities who take reasonable actions, in good faith, to respond to reported threats.