brandon corona is the first veteran and only the second to undergo this kind of amputation.goal is to connect brandon's stump to a new generation of smart prosthetics now under development at mit that would move like a human foot. >> if we can move amputation to an equivalent form of salvage or therapy, that, of course, is a major win for patients. >> reporter: two days after surgery all that's left of his left leg are the screws that hold his leg together. >> i'm happy that i lost my leg and i'm ready to start recovering again. >> reporter: if the new procedure doesn't work, then brandon will use a standard pros thissic. either way the wounded leg that has been run ruining his life for years is gone. >>> coming up on "cbs this morning," greenland and its growing performance. >> the views on the ground are stunning but here the military's looking far beyond. i'm jeff glor. coming up on "cbs this morning," a look at a kwert billion-dollar space detection and warning system and a mission at tooele air base in greenland. >> that's the "cbs morning news" for this tuesday. thanks

brandon corona is only the second patient to undergo this type of amputation.the goal is to connect his stump to a new generation of smart prosthetics now under development at m.i.t. that would move like a human foot. >> if we can elevate amputation to an equivalent form of salvage or an equivalent form of therapy, that, in some ways, is a major win for patients. >> reporter: two days after his surgery, all that's left of his lower left leg are the screws that used to hold it together. >> i'm happy that i have lost my leg and am ready to start recovering again. >> reporter: if the new procedure doesn't work he will use a standard prosthetic. either way, the leg that's been ruining his last four years is gone. >>> it's mosquito season again in much of the country, and that means more concerns about the zika virus. since last year, more than 5,000 americans have tested positive, most contracted the virus overseas, but more than 200 caught it in florida. manuel bamore cass reports from miami. >> reporter: a new push for zika awareness. the cdc is still seeing up t