ProPublica is looking into the ways health insurers’ use of prior authorization impacts patients. We need your help to figure out if the process is still leading to delayed or missed treatments, tests...

The withdrawal came with unusual speed, following what U.S. officials said were threats of an Iran-based plot against the installation.

ProPublica revealed that the FBI was circling Sen. Collins over a defense contractor’s donations — until President Trump gutted the unit in charge. Collins has since mustered a defense with a series o...

Jewel Mullen was in kindergarten in 1961 when she almost died from measles. Now a physician, measles’ return frightens her.

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She was part of the leftist radical group, which mocked institutional authority with political satire and street theater.