ABC World News Tonight viewers were left horrified as long-time host David Muir interrupted the regular programming schedule to deliver a harrowing breaking news update ...

Muir was once again tasked with breaking critical news to his viewers about the government shutdown as he hosted his highly ...

There's been progress — more than a degree Celsius (2 degrees Fahrenheit) has been shaved off future warming projections since 2015 — but the lack of enough of it will be a big focus for the next two ...