The French government has authorized the distribution of an antidote to counter the potentially deadly effects of nerve gas as it rushes to expand security measures after the Paris terrorist attacks that killed 129 people. In a decree published in the French Official Gazette on Sunday, two days after the attacks, the director-general of social affairs, Benoît Vallet, authorized the release of atropine sulfate solution from military stockpiles. The decree stated that the decision to do so was made “considering that the risk of terrorist attacks and the risk of exposure to neurotoxic organophosphates are serious health risks that require...