“I believe that my son and 16-year-old grandson were unlawfully killed by their government."

Samir Khan, a purported al-Qaeda propagandist who spent his teenage years in Westbury, was killed in Yemen three years ago along with another U.S. citizen, Anwar Al-Awlaki, an alleged leader of al Qaeda in the Arabian Peninsula.

The NSA whistleblower will be streamed live from Moscow.