[Kristie Lu Stout, Cnn:] And welcome to News Stream where news and technology meet. Now Kenyans mourn the day after a horrific attack on a university kills 147 people. China formally charges its former security chief Zhou Yongkang, the biggest name yet to be caught in an anti-corruption drive. And on this day in 2010 the original iPad went on sale. Five years on, we look at why sales are slipping. We begin in the Kenyan town of Garissa where more details have emerged about the massacre at the university there. It began early on Thursday morning. Al Shabaab militants set off a bomb at the school gate and started shooting their way onto the campus. Now first, they stormed a Christian prayer service, and then they burst into dormitories, waking up terrified students. Now witnesses say the attackers gunned down non-Muslims and spare the others. A medic tells CNN that most victims were shot in the back of the head. Let's get more now from ENCA correspondent Robyn Kriel who is in Nairobi. And Robyn, why did this happen? Why did al Shabaab attack a university?
[Robyn Kriel, Enca Correspondent:] Well, according to al Shabaab spokesman Mohammed Ragga. He said that the reason that they decided to attack a university in northeastern Garissa is because they accused it of preaching Christianity as well as being a place of infidelity. However, the main reason time and time again that al Shabaab has used for attacking various institutions, soft targets such as shopping malls, as you saw in the Westgate attack in 2013, small villages. We've seen them attacking bars, throwing hand grenades into crowded restaurants, things like that is that they want the Kenyan defense forces to withdraw their troops from Somalia. Kenya sent its troops across the border into Somalia in 2011 using article United Nations article charter 54 as reference to that to protect one's borders. Since then it's joined the African Union force currently battling the al Shabaab militancy trying to instill peace in that country and a legitimate federal government.
[Lu Stout:] And Robyn, why Garissa. What make this town particularly vulnerable to a terror attack?
[Kriel:] Well, the town is just a few miles from the border with Somalia. There is an enormous ethnic Somali Kenyan population there. So Shabaab really if they were to they would be easily able to assimilate into that society. However, it is quite a closed society. I've been there several times. Everyone seems to know each other. So, an attack like this must have had to have been well planned and kept very secret. Why exactly this specific town, the university, as I said, the spokesperson saying it was a place of infidelity. Al Shabaab does not advocate higher learning, especially that of women in its Sharia law in its constitution of sorts. Teaching, especially of women, as I said. And of course this university would be the center of learning, of education, of everything that Shabaab fundamentally stands against.
[Lu Stout:] And Robyn, this attack it puts security in Kenya under fresh scrutiny now. How capable is the Kenyan government to protect and to safeguard its own people?
[Kriel:] Well, I believe these vulnerabilities were exposed, Kristie, in 2013 and there had been sort of a belief in most people who lived here that the Kenyan security services were able to that they had very good intelligence, that they were able to withstand a possible terror attack, that they would have knowledge of this beforehand. However, cracks in that intelligence apparatus were exposed during the Westgate siege lasting 80 hours in which a lot of misinformation was given. It was quite clear that authorities didn't really know what was going on inside and then eventually sending the military in, which ended up in complete disgrace, really, for the security service when it was exposed that the military had been looting after the rescue operation and indeed the death of the attackers had occured. How safe are people today? There have been a number of warnings given by the American embassy, the UK high commission, Australian, Israeli embassies and various others stating that they believed an attack like this preferably not in so many words, but just for their citizens and embassy staffers to be vigilant over the next few weeks to avoid public areas, to avoid public spaces. The UK high commission even saying that they should avoid the coastline altogether. In terms of security, we're going to have to see a real upsurge, a lot of police presence, which were already due to hit the street this Easter weekend. But of course a tightening down even more.
[Lu Stout:] Yeah, and just a moment we'll see the security and police presence in Garissa, in the immediate wake of this terrible attack. Thank you very much indeed for joining us and giving us your view from Nairobi. Thank you, Robyn. Now CNN's Christian Purefoy is live in Garissa. He's outside the university. He joins me now. And what traces of the attack are you seeing there?
[Christian Purefoy, Cnn Correspondent:] Kristie, well it at 5:00 a.m. yesterday morning that the al Shabaab terrorists drove down this dirt track, killed the two policemen standing guard at that gate and went in to the university where over 800 students were waking up to what they hoped, what they thought, was just another normal day. Now we've seen ambulances, we've seen pickups, we've seen security services going up and down this road all day. The university itself is sealed off, we're not allowed in. I have to say even here on the other side of that gate so close is a sense of detachment, Kristie, about the horror and the mass murder that happened there yesterday Kristie.
[Lu Stout:] There's a sense of detachment about what happened. What about a sense of mourning? Have you seen vigils? How is the community coming together to mourn that so many lives lost because of al Shabaab and this terrible massacre that took place yesterday?
[Purefoy:] Well, I think at the moment it's a feeling of just sort of stunned shock, really. You know, we still don't know how many people have died in there. The figure is thought to rise from the 147 we have at the moment. And also it has to be remembered that the students in there didn't all come from just this community, they came from across Kenya. So it's really not just this community that's going to be, you know, coming to terms with what happened behind those gates, Kristie, it's going to be the whole country. There's a lot of people died a lot of people had family members inside the university, Kristie.
[Lu Stout:] Yeah, as a result of the massacre, security has been ramped up in a very significant way. A curfew has been imposed as well. But what is the long-term security plan here? What do Kenyan authorities pledge to do to better safeguard its people at the university and in Garissa?
[Purefoy:] Well, immediately, Kristie, we have been told that, you know, that the first thing is that they say there were four terrorists that went in there and committed this act and that they have been killed. But they are looking for some sort of mastermind behind this. The problem, Kristie, is that really this is you know, wide open spaces. You have the Somali border about 190 kilometers, about four hour drive down bad dirt roads and about that direction. And it's a long porous border. It's very difficult to stop al Shabaab coming from its stronghold in the rural communities in Somalia. And cross in to these regions and hitting soft targets like this. So, really, you know, what Kenya is going to be able to do, ramp up its security obviously, but I think it's trying to stop it before it happens. But again it's so difficult. These places are vast empty tracts of land that people in pickups can just drive through unnoticed, Kristie.
[Lu Stout:] Yeah, Christian, thank you very much indeed for mapping out why the area and why that community there is so vulnerable to attacks by this Somali-based terror group. Christian Purefoy live on the ground from Garissa University, thank you. Now the Saudi military is stepping up security at its border with Yemen. Now this image, it comes from our senior international correspondent Nic Robertson. He is part of CNN crew traveling with the Saudi's border patrol. And you saw these Saudi tanks moving into the border town of Jizan. And this as the Saudi-led coalition tries to push back Houthi rebels in Aden. Now Houthi rebels seized the presidential palace there on Thursday, are said to control much of the city. Aden is the last major stronghold of fighters loyal to the country's deposed President Hadi. Now let's get the latest now on all these developments. Ian Lee joins me live from Cairo. And Ian, it's just reported Saudi tanks have moved to the Yemen border as they step up security for border guards. A Saudi border guard was killed earlier this week. And this begs the question, is a ground offensive going to come up next?
[Ian Lee, Cnn Correspondent:] Oh, definitely it appears that they're moving in that direction, Kristie. You do have, as you mentioned, those tanks moving towards the border. That border guard killed, also in the southern part of the country along the Red Sea and the Gulf of Aden you have warships patrolling, keeping the shipping lanes open, but also preventing weapons from going to the Houthis to resupply them. Then when you focus further on the port city of Aden, despite airstrikes going on for well into their second week, it hasn't seemed to be able to stop the Houthi rebel's advance into the port city. And as you mentioned, it is the last major stronghold of the president of President Hadi. And it is a very strategic town, because if any ground invasion were to take place, you'd likely see a two pronged approach to it from the north along the Saudi border, but also from the south in taking the city of Aden, which has a large port that troops could disembark on. Weapons could go from that direction. So, despite these airstrikes we know that have been going against the Houthis we're hearing at the presidential palace where they recently we took control of, it still hasn't been able to really stop their momentum going forward to taking that city.
[Lu Stout:] And Ian, just an update from our Barbara Starr at the Pentagon. She says that a senior U.S. military officials told reporters that the Saudis have told the United States that their moves on the border are all defensive aimed at border protection, that line from our Barbara Starr at the Pentagon. Now Ian, just talking about the general chaos in Yemen, the Houthi rebel advance in Aden, you gave us the update on that, meanwhile we have al Qaeda in the Arabia Peninusla, AQAP, it opposes both the Houthi rebels and President Hadi and his supporters. How has al Qaeda benefited from all the chaos there in Yemen?
[Lee:] Well, that's the one thing we've been watching closely is how they are exploiting the chaos. when you look at Yemen you can really break it up between east and west. In the western part of the country it's where you have this current war going on between the Houthis and the president President Hadi's forces. But when you look at the eastern part of the country this is where large swaths are under control, or at least operating grounds for al Qaeda in the Arabian Peninsula. And this is the most lethal and dangerous branch of al Qaeda, or one of the most, in the world. The United States puts their numbers at well over 1,000. Yesterday, we saw a jailbreak in one of the capital city of the Hadra Moot province where about 100 militants linked to al Qaeda were freed, including one of their commanders. But they have laid low when it comes to actually engaging either party in this battle. They seem content to wait it out, to see what happens, to make gains where they can. But the real danger is that the United States has pulled out advisers from Yemen. They were there to help go after these al Qaeda militants without them there, there really is no way to track them or keep tabs on these militants as they operate in Yemen.
[Lu Stout:] All right, CNN's Ian Lee reporting live on the situation in Yemen. Many thanks indeed for your reporting, Ian. Now the Israeli prime minister is up in arms over the framework nuclear deal with Iran. And after the break, a live report from Jerusalem. Also ahead, alarming new information from the second black box in the crashed Germanwings plane. We'll take a look at what it reveals about the flight's final minutes. And later in the hour, he was one of China's most powerful officials. And now Zhou Yangkang goes on trial for corruption. We've got the details ahead.