Sites like Twitter and (sigh) Google Plus allow connection between strangers, as do countless topical forums and communities all over the web.

FORBES: Absolving Silicon Valley of Its Social Media Sins

Countless people have phoned and written from all over the country and all over the world -- friends, strangers, quadriplegics, parents of handicapped children -- to say how inspired they were by such an act of kindness and compassion at a time of such unspeakable evil.

CNN: [Abraham J. Zelmanowitz]