Today on "World News with Charles Gibson":

Mother Nature Strikes Again:
On the heels of Myanmar's devastating May 3 cyclone comes news of less powerful yet still severe natural disasters that caused wreckage and death around the world. Over the weekend, the U.S. Midwest experienced a bad spate of tornados, which left more than 20 dead and one town almost completely destroyed. This morning, an earthquake registering 7.8 on the Richter scale hit China, leaving at least 7,000 dead and hundreds possibly trapped beneath the rubble. ABC's Eric Horng reports from Picher, Okla., while ABC's Neal Karlinsky and Stephanie Sy report from China.

Power of Two:
Sometimes doing the simplest things can actually help increase your lifespan by as much as a decade. Dramatically changing your health and life expectancy can seem impossible, but some simple, easy changes can make all the difference. Tonight, ABC's David Muir reveals two things that can help you stay healthy longer in the first installment of our series "Power of Two."

And on our "World News" webcast along with our top headlines:":

Pangea Day:
On Saturday, six venues around the world simultaneously broadcast 24 films chosen from 2,500 submissions for their ability to inspire and connect people across all cultures. The globalcast was part of the first ever Pangea day festival, hosted by such high-profile people as Queen Noor of Jordan, Christiane Amanpour and Cameron Diaz -- all spreading the message of peace. ABC's Lisa Fletcher reports from Los Angeles.