Strikes and counter-strikes between the United States and Iran escalated on Thursday, raising concerns that the conflict may spread across the region. For the first time in five months, military actions are thought to have expanded to Egypt, marked by a drone strike that signals a new front in the ongoing war.

This development is part of a series of military exchanges that have intensified in recent days, with both nations engaging in aggressive maneuvers. The expansion of the conflict into Egypt underscores the potential for this engagement to affect neighboring countries.

William Brangham reports on the latest developments.

Amid these tensions, regional stability is increasingly at risk, heightening fears of a broader conflict that could engulf more of the Middle East.

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