President Trump urged people to stand during the National Anthem at the State of the Union address Tuesday.

During his speech, Trump honored Preston Sharp, a 12-year-old boy from Redding, California, for his national effort to place flowers and flags on Veterans’ graves.

Sharp’s effort to make sure Veterans are properly remembered is called “The Flag and Flower Challenge,” and he’s been doing it since 2015.

“Here tonight is Preston Sharp, a 12-year-old boy from Redding, California, who noticed that veterans’ graves were not marked with flags on Veterans Day,” Trump told the House chamber. “He decided to change that, and started a movement that has now placed 40,000 flags at the graves of our great heroes.”

“Preston,” POTUS continued, “A job well done.”

First lady Melania Trump, who was sitting right next to Preston, patted the young boy on the shoulder as he stood to raucous applause from the chamber.

“Young patriots like Preston teach all of us about our civic duty as Americans,” Trump continued. “Preston’s reverence for those who have served our nation reminds us why we salute our flag, why we put our hands on our hearts for the pledge of allegiance, and why we proudly stand for the national anthem.”