5. The hacker who claims he could take down an airplane with a phone app. You know, we actually have a lot of flights to go on this month. So we really don't appreciate German security researcher and licensed pilot Hugo Teso telling us that it's so easy to take down an airplane from the ground, all you need is an Android. Apparently, there are flaws in the communication network planes use, and these can be exploited to send radio signals telling the pilot to do whatever you want. Frankly, we've never been more freaked out about flying or prouder to be an iPhone user.