New Delhi, Jan 23: Afghan Army Chief Gen Bismillah Khan arrived here today on a three-day official visit, which is expected to pave the way for high-level military exchanges between the two countries. Khan, the first Afghan Army Chief to come here after almost two decades, was scheduled to hold a meeting with chief of the Army Staff Gen N C Vij. However, it could not take place today as the latter's return from a visit to Siachen was delayed. The visiting dignitary will also hold meetings with the Air Chief S Krishnaswamy and Admiral Madhvendera Singh, Chairman Chiefs of Staff Committee. Bureau Report