Keep this for your files.
Can’t be sure about the first, but the second looks like a shaped-charge, like a Claymore.
The explosion goes out to the street, rather than up-all-over.
Professional job ..................................................................................... FRegards
There was a facebook page established on Saturday with Best Wishes for the Victims of the Boston Explosion. Someone poste there, “you put this up already?” So, it was hastily taken down today. This woman I know photographed that page. I’m not so sure that facebook will even bother to report that to the feds since they may have someone else in mind to be the prime suspect. False flags are the norm now.