Recently, India and Pakistan were on the brink of war.  And while the two countries reached an uneasy ceasefire, the history of these tensions goes back decades – to Partition. When the British left India after World War II, they drew a border splitting the country, forming what became Pakistan. This resulted in one of the largest forced migrations in human history - and now the subject of an exhibit underway at the Asian Art Museum in San Francisco. KQED’s Nisa Khan has more.