Intelligence stated that this part of the beach, a mile south of the Coast Guard station and summer homes of Joppa, near the head of the Plum Island road, would be clear for fifty minutes following every hour dusk to dawn.

NPR: Excerpt: 'The Assassins Gallery'

Every ten minutes, from dawn to dusk, a group of 12 climbers sets out--in jumpsuits and headsets--accompanied by a guide.

FORBES: A Can-Do Country

The Bay Bridge lights will fire up nightly at dusk and turn off at 2 a.m. every night until 2015.

CNN: San Francisco turns a bridge into art with 25,000 lights