Thomas Joscelyn is a senior fellow at the Foundation for Defense of Democracies and senior editor of The Long War Journal.

NO ANSWERS

It seems the F.B.I. have made little progress on why the Tsarnaev brothers bombed the Boston marathon. The mystery deepens: who radicalized Tamerlan Tsarnaev?

Iran's foreign minister paid homage this week to a Hezbollah mastermind and an early mentor of Osama bin Laden whose terror tactics inspired the '98 embassy bombings.

Jihadis

New evidence indicates a strong connection between senior al Qaeda leadership and recent terror activity in Africa, contradicting the conventional wisdom, says Thomas Joscelyn.