Looking back on April 15, 2013, the Boston Marathon was shattered by a domestic terrorist attack when two homemade bombs, planted by brothers Tamerlan and Dzhokhar Tsarnaev, detonated near the finish line, killing three civilians.
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Relives the 1941 attack, revealing chaos, heroism, and history reshaped.
Looking back on April 15, 2013, the Boston Marathon was shattered by a domestic terrorist attack when two homemade bombs, planted by brothers Tamerlan and Dzhokhar Tsarnaev, detonated near the finish line, killing three civilians.
Tracing the surprise attack on Pearl Harbor, the top-secret race to build the atomic bomb and the devastation unleashed on Hiroshima.
Columbia's 2003 return ends in tragedy as seven astronauts are lost and a nation mourns.
Retracing the events of the 1980 eruption of Mount St. Helens, revealing the destruction, the human stories and the lessons that continue to shape our understanding today.
Chronicling the 2011 Fukushima Daiichi nuclear disaster, capturing the chaos, critical decisions and technical failures that shaped each moment with official records and archival footage.
Spiritual advisor Jeff Hood travels to Oklahoma to fight for the stay of an incarcerated man's execution.
The announcement of a polyamorous wedding threatens to sever what's left of a family bond.
Track this rare white wolf pack in Yellowstone as it fights for territory through the seasons.
A white female wolf and its black mate take over its parents' territory in Yellowstone Park. For six years, the pack hunts and dens in Hayden Valley, but during the winter, the pack moves great distances, often along the groomed park roads.
With the reintroduction of wolves to Yellowstone Park in 1995, coyotes went from top dog to underdog. Now the coyotes must both depend upon the gray wolves, whose kills feed them through the winter, and defend against their vicious attacks.
With salmon collapsing, a unique orca population starves. Removing four dams could restore their prey.
A team searches for marine debris and discarded fishing gear off the coasts of B.C.'s Gulf Islands.
In Canada, citizen scientists risk everything to protect prehistoric glass sponge reefs once thought extinct.
The world's largest breeding colony of grey seals is found on the remote shores of Sable Island, Nova Scotia.
100 years after Shackleton's South Pole expedition, a mixed crew of adventurers, sportsmen and scientists trace Shackleton's steps. They visit coast at the pole to sail and walk in the harsh conditions of this hostile and yet beautiful environment.
Explore the grueling world of triathlons and one woman's journey to push the sport forward.
Comedian Gilbert Gottfried recounts his career and talks about his new life as a family man.
Portraying real people with big Hollywood aspirations through auditions across Southern California.
Spiritual advisor Jeff Hood travels to Oklahoma to fight for the stay of an incarcerated man's execution.
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