As the world waited with bated breath, the ceasefire between India and Pakistan — two nuclear-armed powers that looked increasingly willing to engage in an all-out war — appeared to be holding into Sunday. That's despite the U.S.-brokered truce's shaky start, which saw explosions and sirens ring out over towns in contested Kashmir only hours after the ceasefire was declared Saturday as senior officials from both India and Pakistan accused each other of violating the terms of the agreement. India's Foreign Secretary Vikram Misri warned late Saturday that his military had been ordered to "deal strongly" with any breaches, while…