Amitabh Bachchan greeted fans from behind bulletproof glass outside Jalsa after a bomb threat. The tightened security underscored concerns as police investigated the threatening email. Amitabh Bachchan greeted fans behind bulletproof glass outside Jalsa after a reported security threat. Here's why security was increased and how Abhishek Bachchan stood by his father. Amitabh Bachchan waved to admirers from behind a transparent bulletproof enclosure, following reports of a bomb threat targeting his home.