VANIER: Donald Trump says the U.S. is sealing up its southern border. National Guard planners are already in various sectors on the U.S.- Mexico border in Texas with more troops on the way. Up to 4,000 have been authorized to go. CNN's Kaylee Hartung is at the border.</s>KAYLEE HARTUNG, CNN CORRESPONDENT: Officials here in Texas say the goal is to have at least 250 National Guard troops in place by the end of the weekend. These planning troops being brought to the border to meet with Department of Homeland Security officials as well as Custom and Border Patrol agents to determine the specific resources, respective areas of the border may need. Meanwhile, generals are meeting in Austin, the Texas state capital, to coordinate logistics and troop movements. These 250 troops on the move over the course of the weekend, those are in addition to 100 troops that the governor of Texas had already ordered to be in place along the Texas-Mexico border. Beyond the state of Texas, 150 National Guard troops also are being deployed to Arizona over the course of the next week. That brings us to 500 troops we know who will be on the U.S.-Mexico border before we're aware of plans for California or New Mexico. Beyond the numbers the next question is, what will they be doing when they're down here? I mentioned the focus now on planning. But with further deployments, we anticipate these troops being in supporting roles, like training, construction, intelligence gathering and surveillance by air with the help of helicopters or with cameras and other technology along the border. These troops we should also mention will only be armed in specific situations where they feel self-defense could be necessary. With this supporting role being played by National Guard troops, the idea is that Customs and Border Patrol will be more visible, more flexible and they will be able to make any immigration arrests that may need to be made -- Kaylee Hartung, CNN, Hidalgo, Texas.</s>VANIER: And that does it for us this hour. Thanks for watching CNN NEWSROOM, I'm Cyril Vanier. "WORLD SPORT" is up next. First I'll be back with a look at the top stories.
National Guard Planners Meet on the U.S.-Mexican Border.