Friday, April 23, 1999 The opening ceremony commemorating the 50th anniversary of NATO was held today at the Mellon Auditorium.  Photo By Ralph Alswang | President Clinton delivers his remarks at the NATO opening. |  Photo By Ralph Alswang | President Clintongreets NATO Secretary General Javier Solana. |  Photo By Ralph Alswang | The President,Secretary Solana and the Heads of State and Government pause for a groupphoto prior to taking their seats on the stage. |  Photo By Ralph Alswang |  Photo By Sharon Farmer |  Photo By Ralph Alswang | The President and Mrs. Clinton host the 50th Anniversary NATO Summit Dinner in the East Room of the White House. |  Photo By Ralph Alswang | The President and Secretary General Solana make a toast following their remarks at the NATO Summit Dinner. | |