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.
Every year, New York hosts the largest July 4th fireworks display in the country. This year, the blasts will be going off from the Brooklyn Bridge and the waters around the Statue of Liberty as Lady Liberty gazes out in her usual imperturbable fashion.