this equation. another part is called the doppler effect. you hear weather people talk about it all the time. in terms of the location on the earth, just for understanding it, imagine the satellite is about 22,000 miles above the earth if you went straight down. if it sent a signal out, a handshake with a plane out back, that would mean that the plane is in a certain area. then, if you did it again and it were further, took longer to get that signal, it would suggest that it was further out somewhere. that s how they established the pattern of the dots right here a. series of signals that they received from the plane suggesting it was somewhere along this arc. they knew it wasn t to the north because, as authorities looked at it, there wasn t a lot of there weren t any radar hits out there. plus, the earth is not perfectly
find this missing plane really weren t designed for this. david, i guess by definition, all air disaster reporting is speculation until you can actually pick up the pieces and put them back together. but ten days, 11 days in, are we in for the long haul? what do you think about this latest conflicting report out of malaysia? well, with the acars system that really doesn t change too much in my mind about what happened. the acars system is also designed that if anything else happens irregular on the aircraft, it will send an immediate signal out, so it s not like it only sends a signal every 30 minutes. that s not the situation. okay. so if anything else happened between there, it still would have sent something. so if the transponder was turned off, for example, the acars would have sent a message saying so. if there was a fire on board, if there was dramatic changes to the aircraft during that time period, all of that would have been reported on the acars system if it was capa
david, i guess by definition, all air disaster reporting is speculation until you can actually pick up the pieces and put them back together. but ten days, 11 days in, are we in for the long haul? what do you think about this latest conflicting report out of malaysia? well, with the acars system that really doesn t change too much in my mind about what happened. the acars system is also designed that if anything else happens irregular on the aircraft, it will send an immediate signal out, so it s not like it only sends a signal every 30 minutes. that s not the situation. okay. so if anything else happened between there, it still would have sent something. so if the transponder was turned off, for example, the acars would have sent a message saying so. if there was a fire on board, if there was dramatic changes to the aircraft during that time period, all of that would have been reported on the acars system if it was capable of doing that. if the acars had been turned off, it wo
control. there are two things we have to look at. 1; we have to stop the violence from spilling over and number 2, in my opinion, we have to send agency. we have about 30 agents in mexico. we want to add more agents than they have right now. this is how we can go ahead and help them. so the american people understand how bad this is, one of my colleagues has covered wars and he says, this is as bad as any war. we talked about the violence here. you talked about the revenge beheading, tell the viewers what this is? they are doing a lot of things. they are using car bombing. we see this in other parts of the world. we are seeing beheadings and they are putting them on youtube to send a signal out. in the past, the rules they had was that they would never attack men and women eye mean, the women and children. just recently, they beheaded, i believe a two- or three-month-old baby as a revenge killing. it s astounding. it is terrible that now one of our agency is down.
it ain t happening. no. just not used to that. right now it s 33 minutes past the hour. want to get you updated on the uprising in egypt right now. here s a look. you re looking at what might be the biggest crowds we ve seen so far over the past few weeks in tahrir square overflowing. a sea of protesters all gathered for what is being called the day of departure. protesters are hoping today will be the day hosni mubarak, leader for 30 years, leaves office. our frederick pleitgen is there once again in cairo. fred, hello to you. some question yesterday given the crackdown on journalists, whether or not we would be able to get a live signal out, be able to talk to our reporters. it s good to be able to talk to you now. so far today, large crowds, but are we seeing those clashes and that violence we ve seen over the past 24, 48 hours? to get rid of egypt s president. here is a country where the average age, the median age of egypt is 22 and the ruler it appears we re listeni