17 April 2013 (12:26 UTC-07 Tango)/06 Jumada t-Tania 1434/28 Farvardin 1391/08 Bing-Chen (3rd month) 4711

Clear pics, taken from different angles, have surfaced from the Boston Marathon, showing men wearing black jackets, khaki pants and khaki shoes (paramilitary/contract cops?) and carrying large black backpacks.  One looks to have security credentials hanging from his neck.

The backpacks match the remains of a shredded backpack found at one of the explosion sites (pic of that posted by FBI).  There are also pics of several men in civilian clothes holding similar backpacks, they are all in the area of the explosions.  Another pic shows a man placing a black backpack in a the threshold of a doorway of the building in the explosion area.

Apparently the pics were posted yesterday.  The pics were taken from the second floor of the building where the first explosion took place.  They focus on the crowd below, not on the runners in the street.

There is video of a man getting up and running for his life after an explosion.  His black shirt and black pants are shredded, but he’s apparently not hurt because he immediately gets up and runs way before anyone else in the blast area has recovered their senses.

Do the internet search yourself.