1. Colombian Junglas

The author and former SAS soldier shadows the world's most remarkable police units to confront crime on the frontline. In Rio de Janeiro he operates alongside the BOPE, the special operations battalion of Brazil's military police, as they embark on a typical mission in the city's slums which are rife with drug-dealing gangs.

3. Kazakhstan Sunkar

Nov, 2008

The author and former SAS soldier spends a week in Almaty, the capital of Kazakhstan, and trains with a unit of 120 men coached to handle situations beyond the usual police remit.

4. Polish BOA

The author and former SAS soldier shadows the world's most remarkable police units as they confront crime on the frontline. He travels to Warsaw to meet members of Poland's elite BOA police unit, originally established as a counter-terrorism force in 2001 but now engaged in a battle to tame the organised crime networks that smuggle drugs, weapons and people across Europe. Ryan joins them as they seek to arrest a suspected arms dealer with links to the Russian mafia.

5. Isreali Magav

In Mexico the crime rate is so high, most of the police is army and combat trained, to survive the rage and aggression of the street gangs. Ryan joins a special task force of the federal police of Mexico, on their hunt for gangs and local drug labs. He is also involved in a large training excersize involving a Boeing 777-200ER in a hostage situation

6. Israel MAGAV

The author and former SAS soldier shadows the world's most remarkable police units as they confront crime on the frontline. In Israel, Ryan faces his most difficult task yet as he joins the Magav, the country's border security force which has to police arguably the most disputed territorial boundary in the world. Aside from the political dimension of dealing with their Palestinian neighbours, the Magav also have to counter a range of criminal activities such as drug dealing.

7. Sri Lanka STF