People are freaking out over a bizarre conspiracy theory that the US military is planning to enact martial law this summer under the guise of a Special Operations exercise called Jade Helm 15. Concerns over the theory — which has no apparent basis in reality — are boiling over in Texas, where many people fear that the government will soon start rounding up political dissidents and detaining them in shuttered Wal-Mart stores, Matt Viser at The Boston Globe reports.