Education Secretary Arne Duncan, pictured above, warned that the sequester could mean thousands of teachers will be out of a job. (Brendan Smialowski/Getty Images)

Sequestration dominated the discussion on the Sunday shows, with lawmakers and Obama administration officials addressing the deep spending cuts set to begin taking effect on Friday. Here's a brief rundown of the most notable moments, which are covered in greater detail over on The Fix:

* Education Secretary Arne Duncan warned that the deep cuts could put thousands of teachers out of a job.

* Transportation Secretary Ray LaHood warned of air travel disruptions.

* Sen. Tom Coburn (R-Okla.) said the Obama administration is exaggerating.

* And Sen. John McCain (R-Ariz.) sought to remind viewers about the sequester's origins.