The chatter began weeks ago as armchair engineers brainstormed for ways to stop the torrent of oil spilling into the Gulf of Mexico: What about nuking the well?

Decades ago, the Soviet Union reportedly used nuclear blasts to successfully seal off runaway gas wells, inserting a bomb deep underground and letting its fiery heat melt the surrounding rock to shut off the flow. Why not try it here?

The idea has gained fans with each failed attempt to stem the leak and each new setback  on Wednesday, the latest rescue effort stalled when a wire saw being used to slice through the riser pipe got stuck.

“Probably the only thing we can do is create a weapon system and send it down 18,000 feet and detonate it, hopefully encasing the oil,” Matt Simmons, a Houston energy expert and investment banker, told Bloomberg News on Friday, attributing the nuclear idea to “all the best scientists.”