>> chinese state news agency xinhua is reporting that a chinese patrol ship searching an area of the south indian ocean has detected a pulse signal with a frequency of 37.5 kilohertz per second. so we are, of course, trying to determine, working to determine, as they are, if that pulse is from the pinger of the black box. and we happen to have one here courtesy of g.a. telesis, a company in south florida. guys, if you can take it to it. i want to show where the pinger is. the pinger is in the front of the black box. it's the cylinder. the white cylinder up front here. that is what is emitting the ping, the blue pin 21, tpl and locators are searching for, that battery expected to day, if it held for 30 days, within a few hours of now.