Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Location | Elevation + Height | Delivery | Purpose | Yield |
| --- | --- | --- | --- | --- | --- |
| Izzer | NTS Area U9bp | metres (ft) - metres (ft) | Underground shaft | Weapons development | less than 20 kt |
| Pongee | NTS Area U2ah | metres (ft) - metres (ft) | Underground shaft | Weapons development | less than 20 kt |
| Bronze | NTS Area U7f | metres (ft) - metres (ft) | Underground shaft | Weapons development | 67 kt |
| Mauve | NTS Area U3dp | metres (ft) - metres (ft) | Underground shaft | Weapons development | 18 kt |
| Ticking | NTS Area U9bj | metres (ft) - metres (ft) | Underground shaft | Weapons development | 250 t |
| Centaur | NTS Area U2ak | metres (ft) - metres (ft) | Underground shaft | Weapons development | 1 kt |
| Moa - 1 (with Screamer) | NTS Area U3ed | metres (ft) + 0 | Underground shaft | Weapons development | 2.5 kt |
| Screamer - 2 (with Moa) | NTS Area U3dg | metres (ft) - metres (ft) | Underground shaft | Weapon effect | 9 kt |
| Elkhart | NTS Area U9bs | metres (ft) - metres (ft) | Underground shaft | Weapons development | 6 kt |
| Long Shot | Amichitka Island, Alaska | metres (ft) - metres (ft) | Underground shaft | Joint verification | 80 kt |
| Sepia | NTS Area U3en | metres (ft) - metres (ft) | Underground shaft | Weapons development | 7 kt |
| Kermet | NTS Area U2c | metres (ft) - metres (ft) | Underground shaft | Weapons development | 500 t |
| Corduroy | NTS Area U10k | metres (ft) - metres (ft) | Underground shaft | Weapons development | 120 kt |
| Emerson | NTS Area U2al | metres (ft) - metres (ft) | Underground shaft | Weapons development | 3 kt |
| Buff | NTS Area U3dh | metres (ft) - metres (ft) | Underground shaft | Weapons development | 51 kt |
| Maxwell | NTS Area U9br | metres (ft) - metres (ft) | Underground shaft | Weapons development | less than 20 kt |
| Lampblack | NTS Area U7i | metres (ft) - metres (ft) | Underground shaft | Weapons development | 38 kt |
| Sienna | NTS Area U3cj | metres (ft) - metres (ft) | Underground shaft | Weapons development | 4 kt |
| Dovekie | NTS Area U3cd | metres (ft) - metres (ft) | Underground shaft | Weapons development | 7 kt |
| Reo | NTS Area U10m | metres (ft) - metres (ft) | Underground shaft | Weapons development | 150 t |
| Plaid 2 | NTS Area U2r | metres (ft) - metres (ft) | Underground shaft | Weapons development | 3.5 kt |
| Rex | NTS Area U20h(e) | metres (ft) - metres (ft) | Underground shaft | Weapons development | 19 kt |
| Red Hot | NTS Area U12g.06 | metres (ft) - metres (ft) | Underground tunnel | Weapon effect | 2 kt |
| Cinnamon - 2 (with Finfoot) | NTS Area U3dm | metres (ft) + 0 | Underground shaft | Safety experiment | less than 20 kt |
| Finfoot - 1 (with Cinnamon) | NTS Area U3du | metres (ft) - metres (ft) | Underground shaft | Weapons development | 5 kt |
| Clymer | NTS Area U9ce | metres (ft) - metres (ft) | Underground shaft | Weapons development | 3 kt |
| Purple | NTS Area U3ds | metres (ft) - metres (ft) | Underground shaft | Weapons development | 7 kt |
| Templar | NTS Area U9bt | metres (ft) - metres (ft) | Underground shaft | Peaceful research | 370 t |
| Lime | NTS Area U7j | metres (ft) - metres (ft) | Underground shaft | Weapons development | less than 20 kt |
| Stutz | NTS Area U2ca | metres (ft) - metres (ft) | Underground shaft | Weapons development | 5 kt |
| Tomato | NTS Area U3ek | metres (ft) - metres (ft) | Underground shaft | Weapons development | 6 kt |
| Duryea | NTS Area U20a1 | metres (ft) - metres (ft) | Underground shaft | Weapons development | 70 kt |
| Fenton | NTS Area U2m1 | metres (ft) - metres (ft) | Underground shaft | Weapons development | 1.4 kt |
| Pin Stripe | NTS Area U11b | metres (ft) - metres (ft) | Underground shaft | Weapon effect | 5 kt |
| Ochre | NTS Area U3ec | metres (ft) - metres (ft) | Underground shaft | Safety experiment | less than 20 kt |
| Traveler | NTS Area U2cd | metres (ft) - metres (ft) | Underground shaft | Weapons development | 20 kt |
| Cyclamen | NTS Area U3cx | metres (ft) - metres (ft) | Underground shaft | Weapons development | 12 kt |
| Chartreuse | NTS Area U19d | metres (ft) - metres (ft) | Underground shaft | Weapons development | 73 kt |
| Tapestry | NTS Area U2an | metres (ft) - metres (ft) | Underground shaft | Weapons development | 10 kt |
| Piranha | NTS Area U7e | metres (ft) - metres (ft) | Underground shaft | Weapons development | 120 kt |
| Dumont | NTS Area U2t | metres (ft) - metres (ft) | Underground shaft | Weapons development | 200 kt |
| Discus Thrower | NTS Area U8a | metres (ft) - metres (ft) | Underground shaft | Weapon effect | 22 kt |
| Pile Driver | NTS Area U15a.01 | metres (ft) - metres (ft) | Underground shaft | Weapon effect | 62 kt |
| Tan | NTS Area U7k | metres (ft) - metres (ft) | Underground shaft | Weapons development | 160 kt |
| Puce | NTS Area U3bs | metres (ft) - metres (ft) | Underground shaft | Weapons development | less than 20 kt |
| Double Play | NTS Area U16a.03 | metres (ft) - metres (ft) | Underground shaft | Weapon effect | less than 20 kt |
| Kankakee | NTS Area U10p | metres (ft) - metres (ft) | Underground shaft | Weapons development | 200 kt |
| Vulcan | NTS Area U2bd | metres (ft) - metres (ft) | Underground shaft | Peaceful research | 25 kt |
| Halfbeak | NTS Area U19b | metres (ft) - metres (ft) | Underground shaft | Weapons development | 365 kt |
Question:
What is the purpose of Long Shot?
Answer:
Joint verification