Bhagat Singh(Hanged 1942).A Sikh revolutionary who played important role in organizing militant activity to oust British from India.These young-men were influenced by militancy as opposed to Gandhi-an principles of non-violence.
Khalsabook - Inspiring Khalsa Ideals for tomorrow..
The Jail Notebook and Other Writings - Bhagat Singh
He spent two days stuck in an airport to stand up for the rights of Sikhs.
hari singh nalwa digital painting by ~sharanart on deviantART | Sikhpoint.com
This is Sikhism.
The "Khanda" is the central Sikh symbol, like the cross is for Christians.