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Photos and posters are shown hanging across the walls of Aztec Printing in National City on Jan. 30, 2015.

Aztec Printing Owner Shares His Memories Of The Chicano Movement

As Aztec Printing closes its doors, the pictures on its walls tell a story of struggles, protests and victories in the Chicano Movement in San Diego.

San Diego Police To Equip Patrol Cars With Heart Defibulators

Councilman Mark Kersey on Friday announced new funding to start placing automated external defibrillators in San Diego police patrol vehicles.

Col. Bahit, a former Seleka commander (center), and his entourage pose for a photo during Kalron's August, 2013, visit to Bayanga, Central African Republic.

Former Commando Turns Conservationist To Save Elephants Of Dzanga Bai

Nir Kalron was once an Israeli commando, then private security consultant to African leaders, and a dealer of legal arms. Today he's working with African locals to hunt ivory poachers via satellite.

Army Sgt. First Class William "Kelly" Lacey and family.

US Soldier Killed In Afghanistan

Army Sgt. First Class William K. Lacey, 38, was killed Jan. 4, 2014, in Nangarhar Province, Afghanistan. The Department of Defense reports Lacey died of injuries suffered when his unit was attacked with rocket propelled grenades.

A Palestinian with a green headband, which identifies him as a Hamas supporters, helps a fellow protester with a black-and-white scarf, the symbol of the Fatah movement. They were both taking part in a demonstration near the West Bank city of Ramallah on June 4. The factions agreed to end their feud earlier this year, but many of their supporters remain bitter rivals.

Just Under The Surface, Palestinian Rivals Remain Bitterly Divided

The two leading Palestinian factions recently agreed to end a feud and work together. But in the Gaza Strip, the wounds have not healed from a nasty bout of infighting in 2007.

At last count only three breeding pairs of Mexican wolves lived in the wild, so inbreeding often occurs.

Feds Want To Change Mexican Wolf Recovery

The federal government has proposed to change the recovery program for the endangered Mexican gray wolf. The last public hearing on the issue will be Tuesday.

Amazon, led by CEO Jeff Bezos, faces a federal lawsuit over unauthorized in-app purchases by children.

Tech Week: Google's World Cup Play, Amazon Sued And Kids Tracked

Also in this week's roundup, a tech company that may not exist, using sensors to keep your plants alive and what the debate over sandwich taxonomy teaches us about innovation.

Barbara Marder waits to receive immunotherapy treatment for cancer at Johns Hopkins Hospital in Baltimore.

Harnessing The Immune System To Fight Cancer

Our immune systems constantly fight off disease — protecting us from colds, flu and infection. An experimental treatment called immunotherapy is helping patients' immune systems fight off cancer.

Air Force Col. Steven Nagel joined NASA in 1978 and flew four space shuttle missions, logging more than 700 hours in space. He retired from the space agency in 2011. Nagel died of cancer on Thursday.

Veteran Space Shuttle Astronaut Steven Nagel Dies At 67

The Air Force colonel was among the first group selected by NASA to train for the space shuttle program. He went on to fly four missions, two as commander.

This high-octane dance extravaganza blends the thunder and drama of Irish dance with the sultriness and attitude of Latin American salsa and the glorious rhythms of Africa.

Heartbeat Of Home

Airs Saturday, March 8, 2014 at 7 a.m. on KPBS TV

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