Improvements in transportation security since Sept. 11, 2001, according to General Accounting Office testimony:

AIR

- Installed bulletproof cockpit doors

- Hired a federal passenger and baggage screening work force at more than 400 commercial passenger airports

- Expanded air marshal force from 32 to several thousand

- Trained several hundred pilots to carry weapons in the cockpit

- Required background checks for those who have access to secure areas of the airport

- Established 45-day waiting period for aliens seeking flight training

- Required 911 capability for onboard passenger telephones

PORTS

- Trained six 100-person special Coast Guard teams to protect ports from terrorists to be deployed by Sept. 30

- Boards and inspects high-risk vessels to search for threats and confirm ID of those aboard

- Developed vessel identification system, but need towers at many ports

- Deployed new mobile gamma ray imaging devices to inspect contents of cargo containers

- ``Trusted shipper program'' for 96 percent of all containers

- Deployed U.S. inspectors at foreign seaports based on agreements with 18 countries

- About 300 Customs and INS agents prescreen travelers at Canadian Airports

TRUCKS

- Under USA Patriot Act, people who drive trucks and trains that carry hazardous materials must have their backgrounds checked

BUS

- Created online training courses for drivers

TRANSIT

- $3.4 million in grants to more than 80 transit agencies for emergency response drills

- Security assessments at 36 largest transit agencies

- Technical assistance to transit agencies on security and emergency plans and response drills

Related:

• Full 9/11 Coverage
• Communities Nationwide to Remember 9-11
• Judge Allows 9/11 Suits Against Airlines
• Small Sept. 11 Charity for Kids Thrives
• Remains Found on Scaffolding Thought to be of 9/11 Victim
• Only 42 'Missing' From WTC Attack on 9-11