Culture

Philadelphia marks 25 years since September 11

Philadelphians are reflecting on how the September 11 attacks changed their lives and their city over the past quarter century. Local commemorations and personal stories highlight the lasting impact of that day on the region's communities and first responders.

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Politics

Federal judge blocks Trump's mail ballot order — again

A second federal judge has frozen an order from the Trump administration regarding mail ballots, with the U.S. Supreme Court expected to weigh in soon. The ruling, issued late Sunday, is notable because the judge involved was not seen as a likely opponent of the order.

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Health

Air quality forecasts are life-or-death for some — but hard to get right

Wildfires in recent years have driven record-breaking poor air quality across the U.S., making accurate air quality forecasts critically important for people with health conditions. However, measuring and predicting air quality remains a significant challenge for scientists and public health officials.

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