ABC News Chalnel

NASA study reveals gene changes between twin astronauts

Special counsel subpoenas the Trump Organization for Russia documents

'Instant bridge' that collapsed in Miami supposed to last 100 years

Church shooter's sister arrested after social media post

Family of slain DNC staffer speaks out

Kansas-bound dog mistakenly flown to Japan

White House blames Moscow for poisoning former spy

2 Navy aviators die in crash after ejecting from fighter jet near Key West

Students across the country rally in National School Walkouts to end gun violence

How the TV show 'Deception' depicts real magic tricks on screen

Celebrating the work, mind and humor of Stephen Hawking

Students from across the US participate in walkout

The UK expels 23 Russian diplomats in response to ex-spy's poisoning

Democrats already proclaiming victory in GOP-held Pa. district

Stephen Hawking dies at age 76

Dog dies in plane's overhead luggage bin

Authorities offer reward in Austin bombings investigation

Parkland survivor on significance of school walkouts

Richard Simmons ordered to pay tabloids $130K

Pennsylvania special election so far too close to project

What the team behind HQ Trivia thinks about cheating and how they plan to make money

Trump fires secretary of state on Twitter after months of clashes

Teen victim of deadly package bombing in Texas is identified

Race for House seat neck and neck in GOP-held Pa. district

Pope Francis speaks to the people in new documentary

Who is Rick Saccone?

Who is Conor Lamb?

Trump replaces Secretary of State Tillerson with CIA director

New details on parents accused of torturing 12 kids

Austin officials warn of suspicious boxes after explosions