In New York City, two men who federal authorities say were inspired by the Islamic State brought powerful homemade bombs to a far-right protest outside the mayoral mansion.

In New York City, two men who federal authorities say were inspired by the Islamic State brought powerful homemade bombs to a far-right protest outside the mayoral mansion.

Acts of violence in the last week have laid bare a heightened terrorism threat unfolding against the backdrop of the U.S. war with Iran and as the country's counterterrorism system is strained by the departures of experienced national security professionals at the FBI and Justice Department.

In New York City, two men who federal authorities say were inspired by the Islamic State brought powerful homemade bombs to a far-right protest outside the mayoral mansion. In Michigan, a naturalized citizen from Lebanon rammed his vehicle into a synagogue before being shot by security. In Virginia, a man…

Three acts of ideologically inspired violence have laid bare the heightened terrorism threat, a concern that comes as the U.S. is at war with Iran and as the counterterrorism system is strained.