How many countries were in the original NATO alliance?
12
3
3
5
4
3
5
4
3
5
4
3
5
4
3
5
4
3
5
6
4
3
5
6
4
3
5
6
4
3
5
7
6
4
3
5
7
13
6
4
3
5
7
13
6
4
1
2
3
5
7
13
6
4
1
2
3
12
5
7
13
6
4
1
2
3
12
5
7
13
10
6
4
1
2
3
12
5
7
13
10
6
4
1
2
11
3
12
5
7
13
10
6
4
1
2
11
14
3
12
5
7
13
10
6
4
1
2
11
8
14
3
12
5
7
13
10
6
4
1
2
11
8
14
28
3
12
5
7
13
10
6
4
1
2
11
8
14
28
12
5
7
13
10
6
4
1
2
11
8
14
28
12
7
9
13
10
6
27
1
2
11
8
14
28
12
7
9
13
10
6
27
1
2
11
8
14
28
12
7
9
13
10
6
27
1
2
16
11
8
14
28
12
112
128
128
3 countries
128
12 countries
13 countries
4 countries