Electricity distribution is one of eight critical infrastructures in America that is increasingly inter-connected and vulnerable to cascading failures, says a presidential commission. The Commission on Critical Infrastructure Protection is to submit its final report to President Bill Clinton on October 13. The commission is expected to recommend doubling the $250 million budget so far available for research and development on preventing accidental or intentional threats to the country's arteries -- the systems of electricity distribution, telecommunications, banking and finance, water, oil and gas storage, transport, emergency services and government services. The infrastructure is becoming more vulnerable, it says, in part because of reliance upon the Internet. The commission will recommend that, with much of the infrastructure already in private hands, there should be collaboration between the public and private sector.