Boston bomb suspects' parents retreat to village, cancel U.S. trip - Rumors of a ONE MILLION DOLLAR BOUNTY ON THEIR HEADS

Anzor Tsarnaev and Zubeidat Tsarnaeva speak with journalists at a news conference on April 25. (Getty Images)

The parents of the Boston Marathon bombing suspects have abandoned plans to travel to the United States to bury one son and help in the defense of the other.

• Authorities seek 'persons of interest' in U.S. tied to Boston bombing

• Russia tapped Boston suspect's mother

• The Tsarnaev brothers' troubled trail to Boston