Would they eventually have been connected to those photos if they had just played it cool, particularly if the younger brother cut his hair?
Those two morons? Sure. An intelligent person or persons who know how to plan? Probably not.
There has been an awesome lesson in how not to conduct a terror operation, provided free of charge by a media and government eager to portray the islamic jihadists as white tea party members"
1) use disguises. all the time when you aren't around people who know you. good disguises that you could walk down the street in, and not arouse suspicion as a guy wearing an obvious disguise.
2) pre-place the bombs so you aren't in the photos the day of the event.
3) test your stuff, and use high quality equipment.
4) be somewhere public with witnesses, doing something innocent, when the event occurs.
5) either leave town immediately (or with timers, beforehand), or be secure in your alibi and connections to act cool while the heat is on.
These two boys acted like high school kids pulling a senior prank, and panicked like dogs when the focus came down on them. Hopefully most johnny jihadi types are similar in bearing and maturity.