Officials say each monk was found with around 5kg of Kush - a particularly potent form of the drug - hidden within "false walls" in their luggage.
The BBC spoke with spectators who walked alongside the monks for the last leg of their trek, from Capitol Hill to the Lincoln Memorial.
Nineteen monks have walked single file from Texas to Washington DC, silently advocating for more peace in the US.
Wolverhampton council turns down the proposal due to issues with parking outside the temple.
The Piprahwa Gems were due to be auctioned in May, but the sale was called off after diplomatic intervention.
BBC North West Tonight's Kay Crewdson visits Kagyu Ling as part of her 25 in 25 series.
The BBC speaks to Tibetans as their exiled spiritual leader, the Dalai Lama, turns 90.
A new exhibition at the British Museum in London traces the stunning evolution of India's devotional art through 189 objects.
The jewels are described as one of the most astonishing archaeological finds of the modern era.
