VAN NUYS, LOS ANGELES (KABC) -- Four people are under arrest and facing felony charges for allegedly trying to impede an immigration enforcement operation in Van Nuys. According to U.S. Border Patrol Chief Patrol Agent Gregory Bovino, the suspects "attempted to impede and obstruct our efforts, using improvised devices aimed at disabling our vehicles." Bovino posted photos of the devices on social media on Tuesday -- saying the four used homemade tire spikes to try to stop their vehicles. One photo shows the device embedded in a vehicle tire. Jenaro-Ernesto Ayala, 43, Jude Jasmine Jeannine Allard, 28, Sadot Jarnica, 54,...