Et al means and others or it can mean and elsewhere. When used in citing a reference it often means there are multiple authors of the work cited and the citation is for the first author and the others. John Smith, et al would mean John Smith and his coauthors.
1 NEW YORK: The 39th annual Macy's Firework Show over the East River will last for 25 minutes and draw a crowd of over 3 million spectators. As the biggest firework display in the US, this year's show features more than 50,000 effects. 2  WASHINGTON, DC: Lasting over 17 minutes, this show is among the largest in the US.
In 1997, the Air Force designated Thunder Over Louisville as one of the events for its 50th anniversary celebration. More than 125 military aircraft performed that year, making it the largest combined fireworks and air show in the United States. 2006 show as seen from the Kentucky side of the Ohio River.