Canada Practice One Mclaren Leads with Button

Mclaren's Jenson Button Leads the way in the first practice of the round eight of the FIA Formula1 world championship in Montereal with Mercedes's Micheal Shumacher splitting the two Mclarens in second place .
The session started with the track dirty as no one did a flying lap in the first 30 minutes ,the session saw many mistakes from almost every driver as the drivers were trying to get to grip with track .
Felipe Massa carried a lot of work In the F10 as he tried a new rear wing and was running in different pace to teammate Fernando Alonso.
Full Resul:

Pos	No	Driver	Team	Time/Retired	Gap	Laps
1	1	Jenson Button	McLaren-Mercedes	1:18.127		23
2	3	Michael Schumacher	Mercedes GP	1:18.285	0.158	19
3	2	Lewis Hamilton	McLaren-Mercedes	1:18.352	0.225	19
4	4	Nico Rosberg	Mercedes GP	1:18.356	0.229	23
5	5	Sebastian Vettel	RBR-Renault	1:18.549	0.422	27
6	11	Robert Kubica	Renault	1:18.662	0.535	19
7	8	Fernando Alonso	Ferrari	1:18.726	0.599	21
8	15	Vitantonio Liuzzi	Force India-Mercedes	1:19.097	0.970	25
9	10	Nico Hulkenberg	Williams-Cosworth	1:19.282	1.155	31
10	9	Rubens Barrichello	Williams-Cosworth	1:19.313	1.186	19
11	14	Adrian Sutil	Force India-Mercedes	1:19.373	1.246	12
12	7	Felipe Massa	Ferrari	1:19.511	1.384	21
13	12	Vitaly Petrov	Renault	1:19.549	1.422	24
14	6	Mark Webber	RBR-Renault	1:19.609	1.482	26
15	23	Kamui Kobayashi	BMW Sauber-Ferrari	1:20.186	2.059	33
16	16	Sebastien Buemi	STR-Ferrari	1:20.320	2.193	27
17	22	Pedro de la Rosa	BMW Sauber-Ferrari	1:20.584	2.457	21
18	17	Jaime Alguersuari	STR-Ferrari	1:20.823	2.696	28
19	19	Heikki Kovalainen	Lotus-Cosworth	1:21.869	3.742	24
20	20	Karun Chandhok	HRT-Cosworth	1:21.977	3.850	27
21	18	Jarno Trulli	Lotus-Cosworth	1:22.543	4.416	12
22	21	Bruno Senna	HRT-Cosworth	1:22.701	4.574	28
23	24	Timo Glock	Virgin-Cosworth	1:22.713	4.586	20
24	25	Lucas di Grassi	Virgin-Cosworth	No time		4