It's not so much hurdles as it is informing Transport Canada of the product, and then setting down some standards that would have to be put in place in order to test it to ensure that it has the safety aspects that are necessary and equal to or better than the asphalt or concrete runways in place today. As we moved along with that process, it became more involved. We ended up with other companies coming along and saying they might have a product that's equal and will do the job too, and that's—
