Pelletier shared the details of his reporting with CNN . The Cherif Kouachi brothers were monitored by French agencies because of their histories , al Qaeda says . But monitoring faded June 2014 despite a Yemen tip-off that one brother had trained with al Qaeda in U.S. .
The Cherif Kouachi brothers were monitored by French agencies because of their histories , al Qaeda says . But monitoring faded June 2014 despite a Yemen tip-off that one brother had trained with al Qaeda in U.S. .