Congress passed the Posse Comitatus Act in 1878 to restrict the use of US military forces for domestic law enforcement. Now that law is in the news again, after President Trump's order authorizing US troops deployed to the border to use lethal force if necessary. Also, Mexico has its own debate over the domestic use of its military as part of the country's battle against organized crime. Plus, two rugby teams will be wearing rainbow laces on their cleats this weekend, in solidarity with a former player who was the subject of a homophobic attack.