BP upbeat about new effort to plug oil leak

BP said today it was making progress on what could prove its most effective effort yet to contain the Gulf of Mexico oil leak, but warned that the verdict could be several days away.

A new cap being placed on top of the gusher is intended to provide a tight seal and might eventually allow the oil giant to capture all crude leaking from the well for the first time since an April 20 Deepwater Horizon oil rig explosion set off the environmental crisis.