Mashhad Urban Railway Line 2 tunnel boring, under construction

Iranian construction workers pose before tunnel boring machine's successfil subteranean breach for Mashhad Urban Railway Line 2.

Mashhad Urban Railway Line 2 tunnel access immediately pror to successful boring

Mashhad Urban Railway Line 2 will be a conventional heavy metro, running north-south for 14 km between Koohsangi and Tabarsi with 12 stations.  [source: Wikipedia]

Photos: Moshen Esmaeil Zaheh at Iranian Students' News Agency