DANIEL VICTOR

For the second time in recent weeks, the U.S. airline industry faced major delays. This time, it wasn’t the airlines’ fault.

Barring last-minute problems, the airline was poised to return to its usual schedule, but challenges remain.

Flight delays and cancellations over the holiday weekend have left thousands of passengers stranded. Here’s a look at a few other notable episodes like it…

The former Pittsburgh Steelers running back died days before the 50th anniversary of one of the most memorable plays in N.F.L. history.

The quake was reported around 2:30 a.m. local time. Tens of thousands of customers were without power.

The senator told CNN that she would register as an independent.

With matches on a 30-second delay, China’s television network is able to replace crowd shots with close-ups of coaches.

The United States and England meet in Friday’s late game.

The gay nightclub outside downtown Colorado Springs has been seen as a place of safety.

Those worried about the service’s longevity can preserve their tweets, media and direct messages.