President Donald Trump met with the Gold Star families of the 13 U.S. service members killed in the Abbey Gate bombing and signed a proclamation honoring the service members’ sacrifices on Monday, a day before the fourth anniversary of the devastating bombing.

“As our Nation solemnly marks four years since the attack at Abbey Gate, we honor the memory of the 13 brave souls and every military service member to ever die in the line of duty — and we renew our resolve to protect American lives, defend American interests, and uphold American sovereignty,” Trump’s proclamation said.