![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/02/ag_nif_feat.jpg?fit=860%2C460&ssl=1)
ALIGNING THE TARGET Workers perform maintenance on the National Ignition Facility’s target chamber. When devoid of people, this is where 192 laser beams fire simultaneously at a gold cylinder containing a capsule coated in hydrogen fuel. The positioner that holds the cylinder steady is at right.
Lawrence Livermore National Laboratory