FILE - This combination of file photos shows Tamerlan, left, and Dzhokhar Tsarnaev, brothers who planted bombs at the finish line at the Boston Marathon on April 15, 2013. Detecting and stopping small groups of terrorists is especially difficult when the brothers in arms are, in fact, brothers or cousins, fathers and sons or even wives. Family members can scheme in person in a kind of kitchen table conspiracy beyond the reach of surveillance. Kin may be reluctant to betray any suspicions. And law enforcement, if they catch wind of a conspiracy, may be powerless to plant a mole in such a tight

• Contributor: Associated Press / Alamy Stock Photo
• Image ID: 2P1YNYG
• File size: 16 MB (494.7 KB Compressed download)
• Releases: Model - no | Property - no
• Dimensions: 3000 x 1859 px | 25.4 x 15.7 cm | 10 x 6.2 inches | 300dpi
• Date taken: 16 December 2015
• Photographer: Uncredited

More information

This image could have imperfections as it’s either historical or reportage.

Not available to licence for any broadcast or streaming service, video on demand, film, national newspaper or to create a NFT. This content is intended for editorial use only. For other uses, additional clearances may be required. FILE - This combination of file photos shows Tamerlan, left, and Dzhokhar Tsarnaev, brothers who planted bombs at the finish line at the Boston Marathon on April 15, 2013. Detecting and stopping small groups of terrorists is especially difficult when the brothers in arms are, in fact, brothers or cousins, fathers and sons or even wives. Family members can scheme in person in a kind of kitchen table conspiracy beyond the reach of surveillance. Kin may be reluctant to betray any suspicions. And law enforcement, if they catch wind of a conspiracy, may be powerless to plant a mole in such a tight circle. (AP Photos/Lowell Sun and FBI, File)