It probably would be hard to find a more perfect pairing for the synchronized swimming duet event than Mary Killman and Mariya Koroleva, the two Americans who will be competing at the London Olympics.
Their nickname is "MK squared" because the first letters of their first and last names are the same. Mary Killman and Mariya Koroleva are as close as you can get to sharing the same birthday, with Killman born April 9 and Koroleva April 10, although at age 22, Koroleva is a year older.
They became a duet last September, only six weeks before winning a silver medal at the Pan American Games in Mexico.
Killman says the two have fast become friends.
"We do a lot of things together. We're
