What are the advantages of air transport over other means of transport?

How to lay out the answer. Follow the frame, then write it in your own words.

1 · Open in one line. Air transport is the fastest and most modern means of transport.
2 · Speed. It covers hundreds of kilometres in a few hours.
3 · No surface barriers. Mountains, forests, deserts, marshes and floods do not stop it.
4 · Special uses. It is vital for defence, for rescue and relief in disasters, and for perishable or costly goods such as medicines.
5 · Real life. Helicopters reach flood-hit villages in Assam when roads are cut.
6 · Global links. It links continents and makes the world a global village.
7 · Close with the drawback. Its main drawback is its high cost.

Scoring tip: Give at least three advantages, then one line on cost to show balance.