First Lady Michelle Obama and Jill Biden, wife of Vice President Joe Biden, welcomed a group of mothers with ties to the military to the White House today for a Mother's Day tribute.

Then this happened.

Image courtesy of Sarah Parnass

Yes, that's Michelle Obama arm-pumping in response to cheers from the crowd after Biden referenced the fact that she was a military mom. (Beau Biden, the Delaware Attorney General, served in Iraq.) Michelle Obama also addressed the crowd. "We have an extraordinary group here today," Obama said, according to CBS News. "Moms who have served in Iraq and Afghanistan, military partners who have moved across the country again and again, grandmothers... We have some really phenomenal representation of what mothering can mean."

More video of the event is below.

At least two children at the White House on Monday interrupted the first lady and Dr. Jill Biden's speeches on military moms. Watch their joyful reactions. (Sarah Parnass/The Washington Post)