Mark Martinez, president of Mission Support and Test Services, discusses features of the projectile used with a gas gun housed at the North Las Vegas campus of the Nevada National Security Site on …

Mark Martinez, president of Mission Support and Test Services, discusses features of the projectile used with a gas gun housed at the North Las Vegas campus of the Nevada National Security Site on Monday, Jan. 28, 2019, in North Las Vegas. (Benjamin Hager/Las Vegas Review-Journal) @BenjaminHphoto