What type are these planes that are flying in formation near Culver City, CA? My son in law took these images a few days ago in Culver City California. We would like to know what the vintage (WWII ?) planes are, and in the last image, what would cause such a contrail. The last image is a composite of several shots. (Something landing at Edwards was my guess). His guess for the aircraft are that they are all the DB Dauntless.
My (current) guess is that it may be a 

Nanchang CJ-6


  The Nanchang CJ-6 is an aircraft designed and built in China for use
  by the People's Liberation Army Air Force (PLAAF) as a basic trainer.



Round nose.
Sufficient number airworthy. 
Rectangular wing shape.
Main gear folds inwards and the nosegear backwards which seems to fit when I zoom in your pictures.




and they do airshows:

(source: riversideca.gov)  

Coincidentally, the upper-left aircraft #43 also appears in your pictures (first picture, rightmost aircraft). Another below of her below:



update: as Cardinal said above, "This is likely Tiger Squadron, perhaps flying for the Israel Independence Day Festival over Rancho Park in mid May, as detailed on their Facebook page."