A federal judge has reopened a lawsuit challenging Louisiana’s execution protocol as the state prepares to carry out the death penalty using nitrogen gas in the coming weeks.

Condemned South Carolina inmate Brad Sigmon has chosen to die by a firing squad. He would be the first U.S. inmate shot to death in an execution in 15 years.

Richard Osman, 40, was one of 66 passengers who died in the EgyptAir flight over the Mediterranean when a fire broke out on ...