the head of the australian agency coordinating the search for flight 370 calls this an encouraging lead. but says that more work is needed. >> we need to keep at the forefront of our minds the families and friends of the 239 passengers who were onboard the flight. speculation and unconfirmed reports can see the loved ones of the passengers put through terrible press. i don't want to put them through any further stress at this time. here is cnn's paula chew. >> chinese families here in beijing are aware of the latest