Francis had insisted on coming to PK5, considered to be one of the world’s most dangerous neighborhoods, to appeal for peace in a country where two years of Christian-Muslim violence has forced nearly 1 million people to flee their homes.
• Gallery: Pope Francis's Africa Tour Stops at Extremely Dangerous Neighborhood
At least 14 people were killed and two suspects were dead Wednesday after they allegedly barged into a holiday party in a conference room and unleashed a bloodbath.
• Complete Coverage: San Bernardino Shooting
Inland Regional Center shooters in San Bernardino, California, on Dec. 2.
• Gallery: Deadly Mass Shooting in San Bernardino, California
. Refugees and migrants arrive at a beach following a crossing of a part of the Aegean sea from the Turkey's coast to the Greek island of Lesbos, Nov. 28.
. An Indian youth plays cricket in the Maidan area of Kolkata on Nov. 29.
• Gallery: Climate Conference Sparks Global Protests
. A leaf clinging to a window is silhouetted by Christmas lights, Nov. 30, in Salina, Kan.
Editor’s Note: This image was captured on Oct. 6, but NBC News received it on Dec. 1.
. A woman wearing a mask walks through a Yonghegong Lama temple compound shrouded in smog in Beijing, China, Nov. 30. Authorities in the Chinese capital warned of 'severe pollution' and advised the capital's 20 million inhabitants to stay indoors.
. A donkey pokes his head out of the back of a Norman, Okla., Police Department squad car on Dec. 1. Officer Kyle Canaan, in the driver's seat, responded to a call of a donkey on the loose and he transported it to a nearby home.
. Palestinian girls take part in a ballet dancing course, run by the Al-Qattan Center for Children, in Gaza City, on Nov. 25.
. Germany's Wolfgang Kimmig-Liebe, who has been volunteering as Santa Claus for years, is searched by a Carabiniere paramilitary police officer before entering in St. Peter's Square at the Vatican to attend Pope Francis general audience on Dec. 2.
Syed Rizwan Farook and wife Tashfeen Malik unleashed a hail of bullets on a conference room at the Inland Regional Center, a state-run facility for people with developmental disabilities, and were killed about four hours later in a shootout with police.
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