On this weekend's Need To Know, ProPublica managing editor Steve Engelberg talks with hostess Alison Stewart about BP's "other" disaster. The pair discuss various incidents at BP's Texas City refinery, including a 2005 blast that killed 15 people and the April 2010 release of more than a half million pounds of toxic chemicals into the air. Stewart and Engelberg also talk about how a photographer was briefly detained by local police, who in turn gave his information to a BP security guard.

Need To Know airs on PBS stations across the country throughout the weekend. Here is a list of stations and airtimes.