A family sleep on the ground in Beirut's corniche area after fleeing the Israeli airstrikes in the southern suburbs of Dahiyeh, Sunday, Sept. 29, 2024. Bilal Hussein/AP ...

Four years after a fiery chemical blast on Beirut’s waterfront killed more than 200 people and left thousands injured, no one has been held responsible for the deadly tragedy.

The U.S. and other governments issued Lebanon travel advisories and some airlines stopped flying there, in anticipation of an escalation of fighting after assassinations in Iran and Beirut.