Christmas Day came and went with no sign of the “gift” that North Korea warned could come.

Earlier this month, Pyongyang set an year-end deadline for the U.S. to make new concessions in talks over the country’s nuclear arsenal.

And amid fears that North Korea was expanding a factory linked to the production of long-range nuclear missiles, the U.S. flew several spy planes over the Korean Peninsula during the holiday, according to South Korean media, citing military aircraft tracker Aircraft Spots.

It was the second time this week that the U.S. has monitored the secretive regime, after it flew four spy planes over the peninsula earlier this week, the news agency reported.