Former Security Chief for El Al

Isaac Yeffet, a former security chief for El Al, Israel's National Carrier, criticized the TSA for what he called a lack of urgency in addressing the air cargo problem, citing a leaked report that undercover agents were able to smuggle prohibited items past the EWR in 20 out of 22 attempts.

See an illuminating 2002 interview via PBS with this security expert:

Isaac Yeffet's interview on Airport Security.