The terror attack at the Boston Marathon reminds us all of how vulnerable we are no matter where we live. The minute I heard the news, I emailed my girl friend Barbara O’Connell who lives in Boston with her husband Frank, a client of mine several times over, to see if they were safe.

She immediately emailed back, “It’s like 911 all over again.” Thoughts of the day flashed in my brain instantly. We all felt so confused, isolated, and on-the-outside looking in. Most of us turned on our TVs to learn more about what was going on.

Today, folks went to Twitter to keep up with the news

MassGeneral News @MassGeneralNews)
Contrary to some reports, #MGH is not currently on lockdown.

Katie Couric (@katiecouric)
As a frequent visitor with family and friends in Boston, I am sending my thoughts and prayers to that wonderful city and its people.

NYC Mayor’s Office (@NYCMayorsOffice)
We are asking all New Yorkers to remain vigilant in the days ahead. If you see something, say something.

Susan Rice (@AmbassadorRice)
My thoughts and prayers are with the people of Boston tonight, and with all of the runners and their families. #prayforboston

Chuck Schumer (@ChuckSchumer)
Thoughts & prayers are with everyone in Boston. Our bipartisan work on immigration will wait at least a day out of respect for the victims.

Justin Bieber (@justinbieber)
#PrayForBoston

Ludacris (@Ludacris)
Thinking about the city of Boston right now

CNN Breaking News (@cnnbrk)
FBI looks at surveillance camera videos, requests cell tower records & searches fragments for bombmakers “signature”

Yahoo! (@Yahoo)
New Kids’ Joey McIntyre completes #Boston Marathon minutes before explosions.

Tony Robbins (@tonyrobbins)
Just landed & heard about the Boston Marathon Bombing. Sending Prayers to the victims & their families. We will assemble a team to help them

Ellen DeGeneres (@TheEllenShow)
Sending love to Boston.

daniel tosh (@danieltosh)
not tweeting is my way of showing respect.

Justin Wolfers (@justinwolfers)
That 78-year old guy in the vid knocked over by the blast? Got up, dusted himself off & finished 2nd in his division

Bette Midler (@BetteMidler)
I am so sorry, the paper said 12 perished… Please for@give that last tweet

Mariah Carey (@MariahCarey)
So sad I am at loss for words. My heart goes out to everyone in Boston. #PrayForBoston

TODAY (@todayshow)
Tomorrow on @todayshow: @MLauer reports live from Boston on what we’ve learned overnight about the marathon tragedy

BostonPublicLibrary (@BPLBoston)
The Central Library in Copley Square will be closed Tues, 4/16. All other BPL locations will be open regular hours

City of Boston (@NotifyBoston)
Via @Boston_Police, the following crime scene perimeter has been established:

The Associated Press (@AP)
Boston tragedy delays immigration bill

Boston.com News (@BostonDotCom)
Globe correspondent PD Rosso was at Boston Medical Center when Marathon bombing victims started arriving.

Guy Kawasaki (@GuyKawasaki)
Google Person Finder Locates Missing at Boston Marathon Explosion on.mash.to/116PYx7 via @mashable

Our thoughts and prayers are with the City of Boston