BP: What reason do we have to believe the second hole won't blow?

[darxus]

Since I heard that BP's long term solution to the oil leak, which was going to take until August, involve drilling a second hole, I've wanted to know:

What reason is there to believe the second hole won't blow?


(Also, why don't they put an upside down funnel over the hole, with a valve at the top, and anchor it with cables?)