New film on homegrown terrorism shows how the Internet is the real engine of radicalization – and how Trump's policies will only make things worse
A new documentary goes deep into Timothy McVeigh's background – and uncovers some very familiar problems
This is the safest time in human history. So why are we all so afraid?
GOP nominee has history of jumping to dangerous conclusions – most recently after the New York bombing
Some have raised objections to Trump applying for federal recovery funds, lobbied for by then Sen. Hillary Clinton
On the failed efforts to build a Global War on Terror memorial, while a shopping mall is built at the 9/11 site
Republicans just faced crippling blows on abortion and Benghazi, while Trump continues to destroy the party
Gun-rights groups have in recent years given much more money to sympathetic politicians than gun-control advocates have
"We have a moral obligation to act and not accept that this is inevitable," says Chris Murphy of Connecticut
The power of the gun lobby has made Americans vulnerable to terror
Omar Mateen had "no record of previous hate crimes" — though that depends how you categorize domestic violence
What's perhaps most devastating about Omar Mateen's mass shooting is how preventable it might have been
Combining conspiracy theory and narcissism, Trump's response underscores he is temperamentally unfit for the presidency
There's a reason we saw such violence this weekend, and why that violence will continue
Weapon "has become the gold standard for mass murder of innocent civilians"