Texas Suspect's Private Messages: 'The Noose Is Tightening'
ISIS calls would-be killers "soldiers of the Caliphate."
Russians to Testify in Boston Bombing Trial Under 'Hotel Arrest'
Officials: One witness sent home after arriving over security concerns.
Top DHS Official Denies Political Favoritism in '$500,000 Visa' Program
Reps question Alejandro Mayorkas on allegations of perception of impropriety.
Prosecutors: Ex-FBI Agent Perjured Himself in 'Whitey' Mobster Trial
Robert Fitzpatrick, 73, pleads not guilty to 6 counts of perjury, obstruction.
Weinstein Family Blasts U.S. Government Over Al Qaeda Hostage Crisis
Official: Warren Weinstein, another hostage killed in CIA drone strike.
Bill Clinton Cashed In When Hillary Became Secretary of State
New book offers no evidence of wrongdoing.
New Video Shows Boston Marathon Bomber in Holding Cell
Three months after blasts, Dzhokhar Tsarnaev gives cell camera the finger.
Feds Open Criminal Investigation Into Guardrail Safety Controversy, Officials Say
Documents show DOT Inspector General quietly gathering information.
Cracks in the Ice: Boston Bomber Cries in Court
Until today, Dzhokhar Tsarnaev hardly showed emotion during agonizing trial.
Feds Subpoena Documents From Maker of Suspect Guardrails
Criminal investigation of Trinity Industries broadens.
Official: WH Likely to Create Hostage Family Engagement Team
Parents of slain journalist welcome moves.
Watch: Investigation Impact: Miners Get Another Shot at Black Lung Benefits
After ABC News report aired, the U.S. Labor Department threw out a doctor's findings.
Watch: Americans Lose Billions in Chinese Investment Frauds
Chinese companies kicked off NASDAQ, NYSE after fraud allegations.
Watch: High Fashion, Deadly Factories
Tommy Hilfiger agrees to safer factories after ABCNews investigation.
Watch: Sexual Misconduct in U.S. Swimming
Part 1: Swim coaches have been banned over sexual misconduct with young girls.