When her son, journalist James Foley, was kidnapped in Syria by ISIS, Diane Foley, along with the rest of her family, became tireless advocates for his safe return. For 21 months, they showed strength and grace, even as they learned the very worst happened to him.

Diane Foley spoke exclusively to Anderson Cooper about the son she loved and the James Foley Legacy Foundation. She also candidly discussed her belief that the U.S. government did not do enough to bring James and Steven Sotloff home safely.

She explained the situation saying:

'Jim was killed in the most horrific way. He was sacrificed because of a lack of coordination, lack of communication, and a lack of prioritization.'

Watch part 2 of Anderson's interview with Diane Foley.

We invited the White House to provide someone to comment on Diane Foley's assertions, but they declined. However, during an interview with National Security Advisor Susan Rice, Wolf Blitzer asked about it. You can watch her response, along with Anderson's conversation with Dan O'Shea, a former hostage negotiator at the U.S. Embassy in Baghdad and  Maajid Nawaz, a former jihadi recruiter.