— -- This is a rush transcript for April 26, 2015. It will be updated and may contain errors.
ANNOUNCER: ABC's This Week. Breaking now, is there a dramatic shift coming in how we treat ransom demands from terrorists? Brian Ross on the story. It's an ABC News exclusive.
Plus, brand new details on the investigation into that deadly drone mistake.
Clinton cash, the men at the center of the latest campaign firestorm is here revealing more explosive allegations about Hillary Clinton from his upcoming book.
Bruce's big announcement, will the former Olympian change the way we view transgender people?
Plus, Washington's wild night: all the hilarious surprises and the amazing moments from the White House Correspondents' Dinner.
BARACK OBAMA PRESIDENT OF THE UNITED STATES: My advisers asked me, Mr. President, do you have a bucket list? I have something that rhymes with bucket list.
ANNOUNCER: From ABC News, This Week with George Stephanopoulos begins now.
GEORGE STEPHANOPOULOS: And we have so much to cover this morning. We begin with breaking news, new aftershocks in Nepal across south Asia after that massive 7.8 earthquake that has killed thousands already.
The pictures of the devastation just incredible, that is an avalanche that was sparked by the quake. It's hit climbers near Mount Everest. Let's get right to ABC's Alex Marquardt on the phone from Delhi India, the staging ground for the aid effort. Good morning, Alex.
ALEX MARQUARDT, ABC NEWS CORRESPONDENT: Good morning, George.
We got word from Nepal just a short time ago that there's been another huge aftershock this morning. Our ABC News team was in the air over the capital of Kathmandu when it struck. We were turned back to India because it was so powerful that the airport was closed.
Rescue teams in Nepal now frantically digging through the rubble looking for any survivors. Many across the country spending the night outside, fearful that more tremors would bring down their homes.
Now we know that at least two Americans were killed, both on Mount Everest, when the base camp was hit by a huge avalanche triggered when the earthquake struck. One of them was Google executive Dan Fredinburg, at least 16 others on a mount also died.
The situation is still very fluid this morning, George. Rescuers and resources are desperately trying to get into Nepal amid fears that the death toll will only continue to grow -- George.
STEPHANOPOULOS: Thank you, Alex.
The U.S. ramping up its aid effort as well.
We're going to turn now to the fallout from that tragic drone strike revealed this week by President Obama. Two innocent hostages, including American Warren Weinstein, killed by mistake. And as President Obama has called for a fullscale review of America's drone policy, ABC's chief investigative correspondent Brian Ross is here with an exclusive report on how America's policy on ransom for hostages may be changed, too.
Good morning, Brian.
BRIAN ROSS, ABC NEWS CORRESPONDENT: Well, good morning, George.