Both countries have ordered air strikes over the last two days, the first time in history that two nuclear-armed powers have done so, while ground forces have exchanged fire in more than a dozen locations. Tensions have been running high since at least 40 Indian paramilitary police died in a Feb. 14 suicide car bombing by Pakistan-based militants in Indian-controlled Kashmir, but the risk of conflict rose dramatically on Tuesday when India launched an air strike on what it said was a militant training base. Pakistan says no one died.
