| Answer | Crossword Clue |
|---|---|
| MIR | It was in orbit for 15 years |
| MIR | It was up for just over 15 years |
| TRON | Sci-fi film recognized with an Oscar for Technical Achievement 15 years after it was released |
| NICKEL | It was redesigned in 2004 for the first time in 66 years |
| ICE | For the first time in millions of years, it was absent from the North Pole |
| MIR | It went around for 15 years |
| AMERICANFLAG | It had 15 stripes for 23 years |
