“We must never forget the enduring pain of the families and loved ones of the 2,977 innocent people who were killed during the worst terrorist attack on America in our history,” Biden said in a statement Friday.

“For them, it was not only a national and international tragedy.The president’s executive order came after nearly 1,800 Americans directly affected by the attacks issued a statement last week, opposing Biden’s participation in any memorial events this year unless he upholds his pledge to declassify the documents, evidence they believe may show a connection between Saudi Arabian leaders and the events.I welcome their voices and insight as we chart a way forward.”