weeks sends a message home. >> the last line is this is one day, so that means it's only 27 days until i see you all again. >> around 12:30 a.m., malaysia airlines 370 pushes back from the gate and gently eases towards the runway. the aircraft is cleared for takeoff. >> let's go. >> all right. so the brakes are off and everything is set. >> the captain boosts the mass i have engines. the plane roars into the sky. its altimeter tracking its climb through 5,000 feet then 10,000 feet. now airborne, air traffic controllers pick up the flight. >> they're going to see you on their radar because you've got what's called a squawk code in your transponder, which turns your simple radar return into something that has a lot of information on it. it includes the flight number