Interesting photo that I can't get directly off of the site. Shows two guys dressed similarly with backpacks.
Not only dressed similarly but the backpacks look large enough to hold a 6 liter device. Also notice in the top photo they are both touching their ears as if trying to push/cover a hearing device in their ears (possibly because of crowd noise). Who uses those types of ear buds? Do I smell a conspiracy/red flag event?
I thought that they were both using cell phones. Using anything else like say a scrambled RF transceiver might indicate a high level of sophistication. Hard to say. You could use an ordinary Motorola two-way radio with a hands free headset and then just use code words to coordinate the attack.
I do think that there had to be two people involved in order to plant two devices. I can't imagine how you would tote two of those things by yourself and plant them without drawing attention. What makes sense is walking to your target area, taking off the backpack and setting it on the ground for several minutes and then setting the timer and walking away. A short duration timer of say, two or three minutes would allow you to leave the detonation area safely and make your escape in the chaos following the explosion. Five minutes, tops.
Two people making two simultaneous drops with similar timer settings makes the most sense. The bombs went off within ten seconds of each other and that could be explained by two people not starting their timers at the exact same moment even though they were coordinated as to the start of the attack.
Having the bombs in backpacks also makes more sense than anything else. Everyone has a backpack. Drop it on the ground, wait a minute or two, set the timer and then walk away.
And conspiracies and false flags would be the last thing on my suspicion list. I would put "attack by space aliens" ahead of a conspiracy.
