A look at how the world has changed since September 11	Day 1: Security concerns

Utilities, public facilities, and private businesses across Greater Boston have increased security. (Globe Staff Photos / David L. Ryan)

Security becomes a way of life after September 11 As the year since Sept. 11 has unfolded, security has become the new norm in Greater Boston. It's hardly worth remarking on. But one year after Sept. 11, how secure are we really? Chart: How security has changed Hospitals begin to address shortcomings The Sept. 11 terrorist attacks, followed barely a month later by the anthrax panic, revealed weaknesses in the nation's health system, propelling a year of self-examination and new spending by medical centers and government.

FROM THE ASSOCIATED PRESS New officers stress training centers Coast Guard takes on new roles Experts say to continue being vigilant Americans questioning some security restrictions Engineers study tragedy to improve safety Logan rebounds from disaster with new security 'Homeland security' is new mantra for marketers Massport tries to shed image as patronage haven Agency planned Sept. 11 plane crash exercise Graphic: Catering to the security market

MESSAGE BOARD Is America a safer place today than it was one year ago? Have new security measures made you feel more confident? In your opinion, how likely is another terrorist attack on US soil? Read messages  CHAT TRANSCRIPT Airport security: State Police Maj. Thomas Robbins, interim security director at Logan Airport, discussed security one year after the attacks.