abc's nikki battiste is in perth, australia, with the latest on the mystery of flight 370. >> reporter: ten planes and nine ships are out looking for any debris from flight 370 as this desperate search enters day 24. the weather here today is poor meaning lower visibility and an even bigger challenge. as search teams continue to scour the southern indian ocean, we learned the final words spoken from the cockpit before flight 370 disappeared. malaysian's transport ministry says it was "good night, malaysian 370. authorities are still trying to determine whether the voice belongs to pilot or co-pilot. aviation experts say this sign-off is routine and provides no new clues in the mystery of flight 370. now in week four of the search there is greater urgency to find the plane's black boxes. today australian ocean shield is on route carrying on board these navy devices for listening and look under the water. >> the search area is very large. it's vast and clearly an area that the lack of which we probably haven't seen before. >> reporter: but so far the eyes in the sky have not yet spotted

abc's nikki battiste flew with one of them. >> reporter: we've been above the search area now for about two hours, and we've seen some objects on the water, but the crew says nothing significant, nothing that seems to be from the missing plane. there are about 15 crewmen on board here all with very specific tasks, and this plane today flying down low, swooping down as low as 300 feet above the water, so close that if you're looking out the window, you feel like you can touch it. >> well, it's been 25 days since flight 370 vanished, and no debris from it has been found yet. submarines may have better luck listening underwater, but it is a race against time. >>> thousands of firefighters from across the country have poured into boston ahead of funeral services for two of their own killed last week in the line of duty. mourners lined up for miles to attend a wake for lieutenant edward walsh. the 43-year-old father of three will be laid to rest today. 33-year-old michael kennedy will be buried tomorrow. they were trapped in a basement while battling a huge building fire. >>> well, crews in

nikki battiste, thank you.ore of us are pumping it these days to get fit, but is it always the best path to better health? >> there's a new debate among doctors over whether it's possible to be both overweight and healthy. and this morning at least one cardiologist says it's time to change the focus away from thin being in. here's abc's reena ninan. >> reporter: meet 61-year-old roger juneau. he had a heart attack 20 years ago. today at 191 pounds, he's still overweight, but his doctor's orders -- don't worry about shedding the pounds. >> fat is not always the devil. >> reporter: it's a radical point of view in our weight loss-obsessed society. where the body mass index uses your height and weight to determine how overweight you are. 25 or higher, you're overweight. 30 and up, you're obese. roger's bmi is 29.4. dr. carl lavee wants americans to stop fearing fat. >> linebackers in the nfl would all be considered obese by the bmi method and have hardly any body fat. they're almost all muscle. >> reporter: he's wr

nikki battiste has the latest on the mystery from perth, australia. >> reporter: ten planes and ninenter the search day 24. weather is poor, meaning lower visibility, an even bigger challenge. search teams continue to scour the indian ocean, we learn the final words spoken from the cockpit before flight 370 disappeared. malaysian's transport ministry said final words were good night, malaysian 370. authorities are still trying to determine whether the voice belongs to the pilot or co-pilot. aviation experts say this sign-off is routine and provides no new clues in the search for flight 370. there is greater urgency to find the plane's black boxes. today "ocean shield" is en route to the search area carrying on board the u.s. navy devices for listening and looking under water. >> the search area is very large, vast, and clearly an area that, for lack of which we haven't seen before. >> reporter: but so far the eyes in the sky have not yet spotted any debris from the plane. just fishing tackle and floating trash. underwater search team hopes the plane finds something on the surface bef

abc's nikki battiste has been putting them to the test.ed about this. >> if you don't like the taste of coconut water, there's a solution, watermelon water and it's the next big thing on the market. listen up, fellas this may be for you. >> beautiful, bright and pink. >> move over coconut water, watermelon water has arrived. this hot pink drink claims to sweeten your sex life. >> we call it liquid love. how does this help in the bedroom? >> we have a high amount of citrulline, the natural viagra. >> reporter: even beyonce is talking about the craze in her song "drunken love". ♪ watermelon >> reporter: jodi says the product benefits extend beyond the bedroom. >> people in the nightlife world that want to spike it. people using it for hangovers. because your hang over will disappear in ten minutes. hangover cure. >> it consists of a watermelon flesh and nutrition packed rind with a flash of lemon. >> any added sugars at all? >> no sugar, no water. no additives or chemicals. there's nothing. >> reporter: it claims to fight cancer lower blood

abc's nikki battiste has the latest. >> reporter: malaysian prime minister is now here in perth withbott. both leaders met with and thanked sailors and air crew before the search team set off this morning to look for any sign of flight 370 in an area the size of arizona. today's visit is a malaysian prime minister to perth air base in australia, the hub for this mission. in a press conference today, prime minister tony abbott said this search is like putting a jigsaw together. >> this is probably the most difficult search ever undertaken. >> reporter: he give condolences to family members and a plea for them to be patient. >> we will not rest until we have done everything we humanly can. >> reporter: today eight planes and nine ships are looking for new debris. a submarine arrived yesterday, looking specifically for the plane's two black boxes. it will join the u.s. navy team on board the ocean shield which has a black box locator and underwater drone. in the search for clues, little has emerged. the fbi told abc news that final review of the pilot's homemade simulator confirmed no e

nikki battiste is here with more.may be passing their stress on to you. >> super stressful situations. just watching them make you uncomfortable? while researchers say if you witness them in person, the emotional effects could be even worse. they now believe stress can be contagious like a cold and it's all around us. >> look for it. >> reporter: at st. louis university, they are studying it. this man is behaving like he's stressed out. >> you accused me of stealing a gift card. >> reporter: researchers are actually interested in van, the stranger sitting nearby. the question, will van catch the first man's stress? after measuring his heart rate and cortisol levels they found the answer is yes. he caught the man's stress even though they never met. >> you can elicit these responses by watching someone under stress. >> reporter: researchers say stress is passed on through things like facial expressions, voice frequency, odor and touch. while you can get it from a stranger, studies show you are four times more likely to

nikki battiste reports from perth, australia. >> reporter: we're 25 days in and still no plane partsbmarine is joining the search. yesterday i flew with one of the p3 orion crews who say they've never seen anything like this. a plane seemingly to completely disappear. it is take-off number four no for this royal new zealand air force crew. in the morning, hopes are high, adrenaline is pumping. they want to be the team that finds something, anything, from the missing plane. flying at speeds up to 470 miles per hour, they told me this mission is all about resilience. they are in the air about 11 hours each day. four of them scouring the designated search area. we've been about the search area about two hours. we have seen objects on the water but the crew has nothing significant. soon one item is spotted and a touch of optimism on board. the plane makes a few dives to get as close as possible. we see what looks like an other orange piece of fabric floating on the ocean. but crews' hope wanes as they look at what seems to be a fishing net. yesterday the trade association that represents