More than 100,000 trees — including many beautiful live oaks and magnolias — were lost when Hurricane Katrina devastated New Orleans in 2005.

In response, Hike For KaTREEna — a nonprofit group dedicated to reforesting the Crescent City — was created.

Since 2006, more than 10,000 volunteers have helped to plant 13,400 trees — including oaks, cypress, red maples, crepe myrtles, magnolias, redbuds, Savannah hollies and citrus trees such as navel orange, satsuma, lemon, lime and grapefruit.

The shooting outside the Empire State Building on Friday took a new turn Saturday: New York City Police Commissioner Raymond Kelly says all nine bystanders wounded in the deadly incident were "struck either by fragments or bullets fired by the police."

Cross the Mississippi River on Saint Paul's Marshall Avenue and it morphs into Minneapolis' Lake Street — a colorful kaleidoscope of cultures.

As Lake Street's collection of murals grows, so does its sense of safety, beauty and community — thanks to groups of artist-activists.

Washington, D.C. blogger Sam Hiersteiner is a hot sauce fan turned maker. He's already harvested two pounds of chiles — serranos, jalapenos, and habaneros — from his 30-plant pepper garden this month, and he's ready to mash them into hot sauce as soon as more ripen. Last year, he mashed fifty pounds total.While he loved the results, he thought it would be even better with a whisper of the flavor imparted by a barrel used for aging bourbon.

Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors, and musicians, and often includes excerpts from live in-studio concerts. This week:

With the voice of a classic country crooner, singer-songwriter Doug Paisley writes lyrics to which everyone can relate. While fiddles sound off in the background, Paisley takes a break from Oregon's Pickathon Music Festival to perform a new acoustic song for opbmusic.org.

R Community Bikes is a grassroots organization in Rochester that repairs and gives away bikes to people in need.

The vision and tireless work of Dan Lill has helped this group grow from a seasonal bike clinic in a soup kitchen parking lot — with two would-be bike mechanics — to a full fledged nonprofit with 50-60 active volunteer bike mechanics and a 6,000 square foot shop-and-warehouse that provides free repairs to the entire population.