One image, captured shortly before the first blast, shows a family of five from Dorchester watching runners cross the finish line.
Zach Mouzoun, who arrived on a flight from Geneva about 10 minutes before the first blast, told BFM TV a second, louder explosion brought down ceilings and ruptured pipes, mixing water with victims' blood.
Mere hours before the first blast that rocked downtown Cairo early Friday morning, Ansar Beit Al-Maqdis released a recorded message online.
Before the first blast could be taken by County Mayor Magnar Lussand, representatives for Vestlandet Natue and Youth, and The People's Movement Against the Triangle Link had to be moved.
Mr Vine said there were several shockwaves after the first blast and everybody ran into the cul-de-sac before being moved out by police.
Time for the first blast of flatulence.
"Most of the wounded are in a serious condition," said Seemi Jamali, an official at Jinnah Hospital, where most of the wounded were taken, before the second blast struck.
A witness quoted by the newspaper Espressen said the bomber appeared to drop a black object as he walked, pausing to pick it up, before rounding a corner, just before the second blast.
One eye-witness praised the quick-thinking of a security guard, who he believed saved lives by stopping who he believes to be the bomber entering one of the churches shortly before the second blast.
Warning: This footage contains extremely strong language Footage taken from a nearby high-rise building showed the initial explosion before the second blast blanked out the screen with white light, fading to show fireballs shooting into the air from a flaming mushroom cloud.
Video footage shows the moments before the second blast.
