After the further moves 3...c5 4.e3 Nc6 5.Bb5?! Qa5+ 6.Nc3 Ne4 7.Bxc6+ bxc6 8.0–0 Nxc3 9.Qd2 Ne2+! we have reached this position:
It now seems clear that Earth has defended successfully against the attack from outer space. 5.Bb5 is a sensible move which was recently played by Kamsky (who lost against Gelfand) but not really in the London spirit. 5.c3 is the standard move and probably best.
I plan to leave the match here, trusting the kids at Stevenson Elementary School. After the likely continuation 10.Qxe2 Ba6 11.Qe1! (A better try than 11.Qd1 of Parreno Cueto-Bertona, Alicante 2001) 11...Qb6! 12.dxc5 Qb7! (12...Qxc5 13.c4 Bxc4 14.Qc3 is not so bad for White), Black will be an exchange up for little compensation.