Philadelphia Mayor and 1979 Wharton graduate Michael Nutter has extended the weekend curfew once again to discourage violent flash mobs.

While the rest of the world becomes a digital open book, Penn’s students seem to be bucking the trend.

One week after his graduation from Penn, Amit Friedlander was diagnosed with Hodgkin’s lymphoma — a diagnosis Friedlander thinks could be linked to the carcinogens he was exposed to five years earlier on the morning of Sept. 11, 2001.

Ameena Ghaffar-Kucher began in 2004 a study of working-class Pakistani-American immigrants in New York City — but her focus shifted quickly to 9/11’s influence.

This summer, 14 Penn students spent two weeks at the Agahozo-Shalom Youth Village confronting the effects of the Rwandan genocide — and witnessing the faith and optimism of the orphans left in its wake.

Ten years after the attacks that changed the world, some of Penn’s war veterans are only just returning to civilian life.

Vice president for Facilities and Real Estate Services, Anne Papageorge oversaw the design of the approximately $1 billion 9/11 memorial in New York, which is scheduled to open this Sunday.

PennCycles — a bike share initiative ­— is hoping to receive funding to launch its pilot in March.

In the years after the attacks, both interest in and prejudice against Islam increased.

Tucked away in front of Van Pelt Library since the second anniversary of 9/11 is a plaque paying homage to 16 alumni who were killed in the attacks. In this special feature, we take a look at five of those stories, through the eyes of those who knew them best.

A snapshot of Penn on the morning of September 11.

As the events of 9/11 recede further into the past, educators are debating how to best present the historical event to college students who grew up with it and younger students who have little memory of the day.

The day after the towers fell, this paper carried the following plea: “Please take advantage — and take care — of your university’s greatest resource: each other.”

Recent College graduate Rose Espinola wants more Penn students to buy Alta Gracia, which produces living-wage, union-made college apparel.

Former Penn President Sheldon Hackney argues that it might be appropriate to think of freedom, a communal enterprise, as our national purpose.

An architect and Penn parent working on the World Trade Center reconstruction reflects on the past and future of the site.

Penn President Amy Gutmann believes that a big piece of the answer to drive hatred out of the human spirit lies in what universities do.