Two days after BP began a risky effort to stop a gushing oil well in the Gulf of Mexico, company officials refused to say whether America's worst oil spill would end any time soon.
BP warned that it could be Sunday or later before it becomes clear whether its bid to plug the well through an effort known as a 'top kill' is working.
Experts said they could see incremental progress at best from BP's 'spillcam' of mud, gas and oil billowing from the seafloor ... READ MORE
