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On today’s episode of Colorado Edition, we revisit some of our favorite stories. We hear how wildfire smoke is impacting air quality and learn about recently unearthed documents at a former tuberculosis treatment center in Colorado Springs. We also check in with activist Buck Adams to learn about his artistic approach in calling for prison reform.

The $31.3 billion given by wealthy nations, aid groups, charities, large foundations and others in 2013 reflects the shifting mix of donors backing international health projects, an analysis suggests.

Tuberculosis is one of the oldest diseases in human history. Signs of the bacteria have even been seen in Egyptian mummies. Now scientists find evidence that TB is much more ancient than we thought. The bacteria may have started infecting people more than 70,000 years ago, long before farming began.

Tuberculosis was once a top killer in the U.S. The disease was such a threat that overcoming it helped lay the groundwork for modern medicine. Now the bacteria are growing resistant to many antibiotics, and some doctors worry TB could rebound.

Officials in Sheboygan, Wis., scrambled to contain a deadly, drug-resistant form of tuberculosis. An outbreak there serves as a reminder that the contagious disease still poses a threat in the U.S. Treating just nine cases will take months and cost millions of dollars.

One Siberian city is tackling the problem of drug-resistant tuberculosis with a health program affectionately named for an earlier Russian innovation. In the modern Sputnik program, teams of nurses travel around the sprawling city of Tomsk, finding and treating the TB patients who are the hardest to reach.

How contagious is tuberculosis? How could one-third of the world's population be infected with the bacteria? Dr. Mel Spigelman of TB Alliance answers five common questions about the infectious disease.

Russia has struggled for decades to control deadly forms of tuberculosis among inmates. A clinic inside a Siberian prison is finally having some success against the disease by teaching inmates to care for themselves — and their families.

One of the deadliest infectious diseases in the world, tuberculosis is especially hard to diagnose and cure in children. Doctors in Tajikistan are altering treatments used for adults to cure kids with fewer side effects.

A family copes with tuberculosis in a place where a child infected with the illness may be shunned. Nurses are working hard to bring clean air and clear information to every home and every generation.